CA2423411A1 - Scaffold system - Google Patents
Scaffold system Download PDFInfo
- Publication number
- CA2423411A1 CA2423411A1 CA002423411A CA2423411A CA2423411A1 CA 2423411 A1 CA2423411 A1 CA 2423411A1 CA 002423411 A CA002423411 A CA 002423411A CA 2423411 A CA2423411 A CA 2423411A CA 2423411 A1 CA2423411 A1 CA 2423411A1
- Authority
- CA
- Canada
- Prior art keywords
- upright
- base arm
- arm
- longitudinal direction
- supported
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000004873 anchoring Methods 0.000 claims description 11
- 230000013011 mating Effects 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 abstract description 5
- 239000002023 wood Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003195 fascia Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/18—Scaffolds primarily resting on the ground adjustable in height
- E04G1/20—Scaffolds comprising upright members and provision for supporting cross-members or platforms at different positions therealong
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/38—Scaffolds partly supported by the building
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/24—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
- E04G3/26—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons specially adapted for working on roofs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/24—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
- E04G3/26—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons specially adapted for working on roofs
- E04G3/265—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons specially adapted for working on roofs with means to adapt it to a variable pitch of the roof
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/041—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffolds on roof frameworks or on roofs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/046—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/06—Consoles; Brackets
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/06—Consoles; Brackets
- E04G5/062—Consoles; Brackets specially adapted for attachment to building walls
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Movable Scaffolding (AREA)
Abstract
A scaffold system includes a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements adjacent a wall structure in a wall position or on a roof structure in a roof position.
Each scaffolding element includes an upright supporting a base arm slidably on a lower end thereof. An adjustable mount at the free end of the base arm permits mounting of the upright an various roof inclinations when the base arm is fixed relative to the upright for spanning planking material the base arms of the scaffolding elements in the roof position. The upright may also be arranged to span railing elements between adjacent uprights in the roof position for use as a barrier in a fall restraint system. An auxiliary arm is also supported on each upright spaced above the base arm in the wall position in which the free ends of both the base arm and auxiliary arm are secured to a wall structure for spanning planking material between the auxiliary arms of adjacent scaffolding elements.
Each scaffolding element includes an upright supporting a base arm slidably on a lower end thereof. An adjustable mount at the free end of the base arm permits mounting of the upright an various roof inclinations when the base arm is fixed relative to the upright for spanning planking material the base arms of the scaffolding elements in the roof position. The upright may also be arranged to span railing elements between adjacent uprights in the roof position for use as a barrier in a fall restraint system. An auxiliary arm is also supported on each upright spaced above the base arm in the wall position in which the free ends of both the base arm and auxiliary arm are secured to a wall structure for spanning planking material between the auxiliary arms of adjacent scaffolding elements.
Description
SCAFFOLD SYSTEM
FIELD OF THE INVENTION
The present invention relates to a scaffold system and more particularly to a system comprising a plurality of scaffolding elements for supporting planking material spanning therebetween in either a wall position adjacent a wall structure or in a roof position for use as a fall restraint device and material support on a roof structure.
BACKGROUND
Injury to workers is commonly of concern in the construction industry.
Accordingly there is an increasing requirement for employers in the construction industry to provide fall protection for their workers when working on roof structures or other elevated environments. Main areas of concern are workers falling from elevations which may include such activities as setting roof trusses or otherwise working on the roof of a building structure. Readily supporting workers both in preparation for assembly of a roof structure arid working on the actual roof itself is desirable.
SUMMARY
According to one aspect of the present invention there is provided a scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
and a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting _2_ surface, the base arm being supported for sliding movement in the longitudinal direction of the upright;
the scaffolding elements being usable in.:
a roof position in which there is provided anchoring means for selectively restricting movement of each base arm in relation to the respective upright for supporting the uprights on an inclined supporting surface comprising a roof structure whereby the planking material may be supported to span between the base arms of the scaffolding elements; and a wall position in which there is provided an auxiliary arm for being supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement to the supporting surface whereby the free ends of both the base arm and the auxiliary arm of each upright may be secured to an upright supporting surface comprising a wall structure and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
The use of multiple scaffolding elements each having an adjustable sliding base arm which can be fixed by the anchoring means at various positions permits the uprights to be supported in a vertical orientation on various inclinations of roof structures. A barrier along the lower edge of a roof structure can thus be readily formed by spanning planking material between the base arms or by providing an additional railing structure spanning the uprights. In an alternate use, providing both a base arm and an auxiliary arm permits the upright to be supported adjacent a wall structure for readily spanning planking material between the auxiliary arms spaced upwardly from the ground to conveniently support workers thereon.
Providing an auxiliary arm and an adjustable base arm on the same upright readily permits the scaffolding element to be used in either the roof position or the wall position described herein.
According to a second aspect of the present invention there is provided a scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface, the base arm being supported for sliding movement in the longitudinal direction of the upright; and anchoring means for selectively restricting movement of each base arm in relation to the respecfiive upright for supporting the uprights on an inclined supporting surface comprising a roof structure;
whereby the planking material may be supported to span between the base arms of the scaffolding elements.
According to a further aspect of the present invention there is provided a scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface; and an auxiliary arm for being supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement to the supporting surface;
whereby the free ends of bath the base arm and the auxiliary arm of each upright may be secured to ar7 upright supporting surface comprising a wall structure; and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
The mounting means at the free end of each base arm preferably comprises a mounting plate having mounting apertures therein which is supported for relative pivotal movement on the base arm. The mounting plate is preferably pivotal through a range of inclinations relative to the base arm including the wall position in which the mounting plate lies substantially parallel to the longitudinal direction of the respective upright.
When the base arm of each scaffolding element includes a tube for slidably receiving of the respective upright therethrough, the tube and upright may have respective mating cross-sections for restricting relative rotation therebetween.
For additional stability, each scaffolding element may include a foot support fixed to a bottom end of the upright, opposite the auxiliary arm and lying perpendicularly to the longitudinal direction of the upright.
Particularly in the roof position, the upright of each scaffolding element preferably includes a plurality of railing apertures spaced apart in the longitudinal direction and formed to extending through the upright transversely to a direction of the respective base arm. The railing apertures are accordingly arranged to slidably receive railing members therethrough which span between adjacent scaffolding _5_ elements for additional for protection on a roof structure by forming an upright barrier.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a perspective view of a single scaffolding element adjacent a wall structure in the wall position.
Figure 2 is a side elevational view of the scaffolding element in the roof position.
Figure 3 is a front elevational view of a plurality of scaffolding elements with planking material and railing elements spanning between adjacent scaffolding elements in the roof position.
Figure 4 is a perspective view of the base arm.
Figure 5 is a perspective view of the auxiliary wall arm.
DETAILED DESCRIPTION
Referring to the accompanying drawings, there is illustrated a scaffold system comprising a plurality of scaffolding elements, each being designated by reference character 10. The scaffolding elements 10 are arranged for supporting planking material 12 spanning therebetween in either a wall position as shown in figure 1 or a roof position as shown in Figures 2 and 3. The scaffold system is primarily for supporting workers therean in elevated areas in the construction industry. When supported in the roof position the scaffold system may also be used as a barrier including railing elements 14 spanning between the scaffolding elements in a fall restraint system.
Each scaffolding element 10 includes an upright 16 in the form of an elongate rigid tube of square cross section which extends in a longitudinal direction ._ from a first lower end 18 to a second upper end 20. A foot support 22 is provided at the first lower end of the upright in the form of a beam supported perpendicularly on the end of the upright 16 by a pair of braces 24 spanning between the upright and the free ends of the beam. The beam of the foot support 22 is generally square in cross section forming a rigid tube which is fixed with respect to the upright by welding or other suitable mounting mechanisms.
A base arm 26 is supported on the upright 16 for sliding movement in the longitudinal direction of the upright. The base arm 26 generally comprises a rigid channel having a pair of spaced apart sides 28 and a flat upper surface 30 spanning between the top edges of the sides 28. A slider tube 32 is supported at an inner end 34 of the base arm so that an opening therethrough extends generally perpendicularly to the flat upper surface of the base arm. The slider tube 32 is square in cross section having similar dimensions to the upright 16 for slidably receiving the mating cross section of the upright therethrough.
The orientation of the slider tube is fixed with respect to the upper surface 30 of the base arm such that the surface of the base arm lies perpendicular to the longitudinal direction of the upright for supporting planking material thereon. The length of the base arm 26 is suitably arranged to permit a pair of two by ten beams to be laid flat side by side on the upper surface 30. A
reinforcement tube 36 is mounted at the free end 38 of the base arm between the sides 28 of the base arm for added strength at the free end. The base arm is formed of a folded plate metal which receives the slider tube 32 and the reinforcement tube 36 therein by welding or other suitable fastening so that the tubes are fixed with respect o the sides 28 and the upper surface 30 of the base arm.
A pivot plate 40 is pivotally supported an the free end 38 of the base arm 26. The pivot plate 40 includes a pair of parallel mounting plates 42 formed on ..7-opposing sides of the pivot plate at an inner end thereof for mounting on the base arm. The mounting plates 42 are suitably spaced for receiving the free end of the base arm therebetween for pivotal movement about a horizontal axis of a fastener received through co-operating apertures in the mounting plates 42 and the free end 38 of the base arm including the reinforcement tube 36..
The pivot plate itself extends in a longitudinal direction from the inner end to a free end thereof for locating a plurality of apertures towards the free end, offset both laterally and longitudinally from one another for receiving fasteners therethrough to secure the pivot plate to a supporting surface. The pivot plate is pivotal through a range of inclinations relative to the upright including a parallel position in which the pivot plate is parallel to the longitudinal direction of the upright for use in the wall position of Figure 1.
In the wall position, the base arm 25 is slide downwardly to its lowest position on the upright adjacent the fact support 22 for anchoring using a releasable anchor pin 44 which is received through ca-operating apertures in the slider tube 32 of the base arm and the upright 16. When the pin 44 is received through the co-operating apertures, the base arm is fixed in relation to the upright.
In the roof position, the pin 44 is released to permit the base arm to be adjustably positioned in the longitudinal direction of the upright so that the upright may be positioned vertically when the font support 22 and the pivot plate 44 are both engaged on an inclined roof supporting surface. A plurality of transverse apertures are located in the upright at spaced positions in the longitudinal direction for receiving the pin 44 therethrough corresponding to various supporting surface inclinations. Once the desired position of the base arm is located the pin 44 is again used to anchor and fix position of the base arm relative to the upright.
Further fastening of the pivot plate 40 to the supporting surface using suitable fasteners, preferably screws, permits the upright to be secured in the roof position.
Once in the roof position, the railing elements 14 may also be supported to span between adjacent scaffolding elements. The railing elements are supported by a rail support plate 46 in the form of an elongate plate which is positioned parallel and spaced alongside an upper half of the upright 16. A
plurality of mounting rods 48 connect the rail support plate 46 to the upright at a plurality of spaced positions in the longitudinal direction of the upright. The spaced defined between each adjacent pair of rods 48 defines transverse railing apertures 50 extending through the upright with rod spacing being arranged such that each railing aperture 50 is suitably sized to receive a conventional two by four wood beam when the wood beams are arranged to span between adjacent scaffolding elements 10.
The rail support plate 46 includes a fastener aperture formed therein in alignment with each of the transverse railing apertures 50 for anchoring the railing elements within the respective railing apertures.
An auxiliary wall arm 52 is provided for use in the wall position of figure 1. The auxiliary wall arm 52 is similarly supported on the upright 16 and has a length which is approximately equal to that of the base arm 26. The auxiliary wall arm 52 is an elongate member having a pair of sides 54 which are joined by an upper surface 56 spanning between top edges of the sides 54. An inner end of the wall arm 52 includes an opening formed therethrough for slidably receiving the upright and the rail support plate 46 therethrough to permit the wall arm 52 to be slidable in the longitudinal direction of the upright.
A pair of co-operating apertures are formed in each side 54 of the wall arm at the inner end thereof in alignment with the opening receiving the upright therethrough. The pairs of apertures formed in both sides are aligned with one another with each aperture being spaced in the longitudinal direction of the upright.
- ~ -The upright includes a plurality of co-operating apertures formed in pairs at spaced positions therealong for selectively securing the wall arm to the upright by receiving pins 60 through the wall arm and the upright at one of the spaced positions therealong.
Accordingly height of the wall arm relative to the upright may be adjusted depending upon the selected co-operating pair of apertures in the upright to be secured to the apertures in the wall arm. Securing the wall arm with a pair of apertures ensures that the wall arm is fixed relative to the upright both in longitudinal position and angular orientation such that the upper surface 56 remains perpendicular to the langitudinal direction of the upright.
At the free end of the wall arm, the sides 54 project in a longitudinal direction of the arm beyond the upper surface to define a pair of end portions which are parallel and suitably spaced from one another to receive the narrower dimension of a conventional two by four wood beam snugly therebetween.
Fastener apertures are located in both end portions 58 for securement to an upright two by four beam received therebetween when k>eing supported adjacent an upright wall structure as in Figure 1. Planking material in the wall positian is arranged to span between the upper surfaces 56 of the wall arms 52 of adjacent scaffolding elements.
Height of the planking material is thus adjusted by selecting a desired longitudinal position of the wall are along the upright and by subsequent securement of the wall arm in a fixed position by releasable pins 60 received through the co-operating apertures.
Using the companents described herein, the scaffolding elements 10 can be used in either the wall position ar the roof position as shown in the accompanying figures. In the wall position, attachment of both the wall arm and the base arm to a framed wall structure permits an interior perimeter wall scaffold to be formed in which a work platform is provided for use by workers to layout and set trusses on the exterior walls of a building structure from within the interior of the structure. Accordingly workers are not required to balance along the top edges of perimeter walls when setting roof trusses as was previously required.
Additional work in the general area at the base of the roof, including installation of fascia boards and initial sheathing on the roof structure, can also be readily accomplished.
Once the initial installation phases of a roof structure are completed the scaffolding elements may be removed from the wall position and reassembled in the roof position along the base of the roof structure as a temporary fall restraint and perimeter guard rail system. When assembled in the roof position, the auxiliary wall arm 52 is preferably removed so that railing elements rnay be readily installed. The adjustable nature of the base arm also permits a level work platform when operating through a broad range of roof inclinations. ~ecurement of the pivot plate to the roof structure is preferably accomplished by eight #12 two and a half inch long wood screws. The wood screws are installed through the pivot plate and into the roof sheathing and a truss supporting the sheathing thereon. Once the first row of sheathing is installed the scaffolding elements can readily be pasitioned in the roof position thereon. Each of the co-operating apertures in the upright for alignment with the apertures formed at the inner end of the base arm corresponds to a conventional roof inclination. These include four by twelve slopes as well as six by twelve, eight by twelve, ten by twelve and twelve by twelve slopes. The use of the anchor pin secures the base arm at the selected corresponding inclination. The scaffolding elements are preferably supported on the roof structure no more than three meters or ten feet apart using the wand screws received through the pivot plate as noted above. Once the scaffolding elements are fixed on the supporting surface of the roof structure, two rows of two by ten planking material are preferably supported on the base arms in side by side configuration. A guard rail ar railing elements can then be installed by slidably receiving the elements through the appropriate railing apertures formed in the upright. 'fhe railing elements may be secured to the uprights by fasteners received in the apertures in the rail support plate as desired. Height of the railing spanning between each pair of adjacent scaffolding elements preferably alternates being received in the railing apertures from adjacent pairs of scaffolding elements to form a generally consistent barrier of railing elements spanning all scaffolding elements.
The scaffolding elements are intended to be a readily affordable scaffold system for use either adjacent wall structures ar as a fall restraint system on a roof structure. The scaffolding elements are not intended to be a heavy duty support for supporting considerable work materials thereon but is rather intended to mostly support the weight of one or more workers thereon.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. The invention is to be considered limited solely by the scope of the appended claims.
FIELD OF THE INVENTION
The present invention relates to a scaffold system and more particularly to a system comprising a plurality of scaffolding elements for supporting planking material spanning therebetween in either a wall position adjacent a wall structure or in a roof position for use as a fall restraint device and material support on a roof structure.
BACKGROUND
Injury to workers is commonly of concern in the construction industry.
Accordingly there is an increasing requirement for employers in the construction industry to provide fall protection for their workers when working on roof structures or other elevated environments. Main areas of concern are workers falling from elevations which may include such activities as setting roof trusses or otherwise working on the roof of a building structure. Readily supporting workers both in preparation for assembly of a roof structure arid working on the actual roof itself is desirable.
SUMMARY
According to one aspect of the present invention there is provided a scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
and a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting _2_ surface, the base arm being supported for sliding movement in the longitudinal direction of the upright;
the scaffolding elements being usable in.:
a roof position in which there is provided anchoring means for selectively restricting movement of each base arm in relation to the respective upright for supporting the uprights on an inclined supporting surface comprising a roof structure whereby the planking material may be supported to span between the base arms of the scaffolding elements; and a wall position in which there is provided an auxiliary arm for being supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement to the supporting surface whereby the free ends of both the base arm and the auxiliary arm of each upright may be secured to an upright supporting surface comprising a wall structure and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
The use of multiple scaffolding elements each having an adjustable sliding base arm which can be fixed by the anchoring means at various positions permits the uprights to be supported in a vertical orientation on various inclinations of roof structures. A barrier along the lower edge of a roof structure can thus be readily formed by spanning planking material between the base arms or by providing an additional railing structure spanning the uprights. In an alternate use, providing both a base arm and an auxiliary arm permits the upright to be supported adjacent a wall structure for readily spanning planking material between the auxiliary arms spaced upwardly from the ground to conveniently support workers thereon.
Providing an auxiliary arm and an adjustable base arm on the same upright readily permits the scaffolding element to be used in either the roof position or the wall position described herein.
According to a second aspect of the present invention there is provided a scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface, the base arm being supported for sliding movement in the longitudinal direction of the upright; and anchoring means for selectively restricting movement of each base arm in relation to the respecfiive upright for supporting the uprights on an inclined supporting surface comprising a roof structure;
whereby the planking material may be supported to span between the base arms of the scaffolding elements.
According to a further aspect of the present invention there is provided a scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface; and an auxiliary arm for being supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement to the supporting surface;
whereby the free ends of bath the base arm and the auxiliary arm of each upright may be secured to ar7 upright supporting surface comprising a wall structure; and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
The mounting means at the free end of each base arm preferably comprises a mounting plate having mounting apertures therein which is supported for relative pivotal movement on the base arm. The mounting plate is preferably pivotal through a range of inclinations relative to the base arm including the wall position in which the mounting plate lies substantially parallel to the longitudinal direction of the respective upright.
When the base arm of each scaffolding element includes a tube for slidably receiving of the respective upright therethrough, the tube and upright may have respective mating cross-sections for restricting relative rotation therebetween.
For additional stability, each scaffolding element may include a foot support fixed to a bottom end of the upright, opposite the auxiliary arm and lying perpendicularly to the longitudinal direction of the upright.
Particularly in the roof position, the upright of each scaffolding element preferably includes a plurality of railing apertures spaced apart in the longitudinal direction and formed to extending through the upright transversely to a direction of the respective base arm. The railing apertures are accordingly arranged to slidably receive railing members therethrough which span between adjacent scaffolding _5_ elements for additional for protection on a roof structure by forming an upright barrier.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a perspective view of a single scaffolding element adjacent a wall structure in the wall position.
Figure 2 is a side elevational view of the scaffolding element in the roof position.
Figure 3 is a front elevational view of a plurality of scaffolding elements with planking material and railing elements spanning between adjacent scaffolding elements in the roof position.
Figure 4 is a perspective view of the base arm.
Figure 5 is a perspective view of the auxiliary wall arm.
DETAILED DESCRIPTION
Referring to the accompanying drawings, there is illustrated a scaffold system comprising a plurality of scaffolding elements, each being designated by reference character 10. The scaffolding elements 10 are arranged for supporting planking material 12 spanning therebetween in either a wall position as shown in figure 1 or a roof position as shown in Figures 2 and 3. The scaffold system is primarily for supporting workers therean in elevated areas in the construction industry. When supported in the roof position the scaffold system may also be used as a barrier including railing elements 14 spanning between the scaffolding elements in a fall restraint system.
Each scaffolding element 10 includes an upright 16 in the form of an elongate rigid tube of square cross section which extends in a longitudinal direction ._ from a first lower end 18 to a second upper end 20. A foot support 22 is provided at the first lower end of the upright in the form of a beam supported perpendicularly on the end of the upright 16 by a pair of braces 24 spanning between the upright and the free ends of the beam. The beam of the foot support 22 is generally square in cross section forming a rigid tube which is fixed with respect to the upright by welding or other suitable mounting mechanisms.
A base arm 26 is supported on the upright 16 for sliding movement in the longitudinal direction of the upright. The base arm 26 generally comprises a rigid channel having a pair of spaced apart sides 28 and a flat upper surface 30 spanning between the top edges of the sides 28. A slider tube 32 is supported at an inner end 34 of the base arm so that an opening therethrough extends generally perpendicularly to the flat upper surface of the base arm. The slider tube 32 is square in cross section having similar dimensions to the upright 16 for slidably receiving the mating cross section of the upright therethrough.
The orientation of the slider tube is fixed with respect to the upper surface 30 of the base arm such that the surface of the base arm lies perpendicular to the longitudinal direction of the upright for supporting planking material thereon. The length of the base arm 26 is suitably arranged to permit a pair of two by ten beams to be laid flat side by side on the upper surface 30. A
reinforcement tube 36 is mounted at the free end 38 of the base arm between the sides 28 of the base arm for added strength at the free end. The base arm is formed of a folded plate metal which receives the slider tube 32 and the reinforcement tube 36 therein by welding or other suitable fastening so that the tubes are fixed with respect o the sides 28 and the upper surface 30 of the base arm.
A pivot plate 40 is pivotally supported an the free end 38 of the base arm 26. The pivot plate 40 includes a pair of parallel mounting plates 42 formed on ..7-opposing sides of the pivot plate at an inner end thereof for mounting on the base arm. The mounting plates 42 are suitably spaced for receiving the free end of the base arm therebetween for pivotal movement about a horizontal axis of a fastener received through co-operating apertures in the mounting plates 42 and the free end 38 of the base arm including the reinforcement tube 36..
The pivot plate itself extends in a longitudinal direction from the inner end to a free end thereof for locating a plurality of apertures towards the free end, offset both laterally and longitudinally from one another for receiving fasteners therethrough to secure the pivot plate to a supporting surface. The pivot plate is pivotal through a range of inclinations relative to the upright including a parallel position in which the pivot plate is parallel to the longitudinal direction of the upright for use in the wall position of Figure 1.
In the wall position, the base arm 25 is slide downwardly to its lowest position on the upright adjacent the fact support 22 for anchoring using a releasable anchor pin 44 which is received through ca-operating apertures in the slider tube 32 of the base arm and the upright 16. When the pin 44 is received through the co-operating apertures, the base arm is fixed in relation to the upright.
In the roof position, the pin 44 is released to permit the base arm to be adjustably positioned in the longitudinal direction of the upright so that the upright may be positioned vertically when the font support 22 and the pivot plate 44 are both engaged on an inclined roof supporting surface. A plurality of transverse apertures are located in the upright at spaced positions in the longitudinal direction for receiving the pin 44 therethrough corresponding to various supporting surface inclinations. Once the desired position of the base arm is located the pin 44 is again used to anchor and fix position of the base arm relative to the upright.
Further fastening of the pivot plate 40 to the supporting surface using suitable fasteners, preferably screws, permits the upright to be secured in the roof position.
Once in the roof position, the railing elements 14 may also be supported to span between adjacent scaffolding elements. The railing elements are supported by a rail support plate 46 in the form of an elongate plate which is positioned parallel and spaced alongside an upper half of the upright 16. A
plurality of mounting rods 48 connect the rail support plate 46 to the upright at a plurality of spaced positions in the longitudinal direction of the upright. The spaced defined between each adjacent pair of rods 48 defines transverse railing apertures 50 extending through the upright with rod spacing being arranged such that each railing aperture 50 is suitably sized to receive a conventional two by four wood beam when the wood beams are arranged to span between adjacent scaffolding elements 10.
The rail support plate 46 includes a fastener aperture formed therein in alignment with each of the transverse railing apertures 50 for anchoring the railing elements within the respective railing apertures.
An auxiliary wall arm 52 is provided for use in the wall position of figure 1. The auxiliary wall arm 52 is similarly supported on the upright 16 and has a length which is approximately equal to that of the base arm 26. The auxiliary wall arm 52 is an elongate member having a pair of sides 54 which are joined by an upper surface 56 spanning between top edges of the sides 54. An inner end of the wall arm 52 includes an opening formed therethrough for slidably receiving the upright and the rail support plate 46 therethrough to permit the wall arm 52 to be slidable in the longitudinal direction of the upright.
A pair of co-operating apertures are formed in each side 54 of the wall arm at the inner end thereof in alignment with the opening receiving the upright therethrough. The pairs of apertures formed in both sides are aligned with one another with each aperture being spaced in the longitudinal direction of the upright.
- ~ -The upright includes a plurality of co-operating apertures formed in pairs at spaced positions therealong for selectively securing the wall arm to the upright by receiving pins 60 through the wall arm and the upright at one of the spaced positions therealong.
Accordingly height of the wall arm relative to the upright may be adjusted depending upon the selected co-operating pair of apertures in the upright to be secured to the apertures in the wall arm. Securing the wall arm with a pair of apertures ensures that the wall arm is fixed relative to the upright both in longitudinal position and angular orientation such that the upper surface 56 remains perpendicular to the langitudinal direction of the upright.
At the free end of the wall arm, the sides 54 project in a longitudinal direction of the arm beyond the upper surface to define a pair of end portions which are parallel and suitably spaced from one another to receive the narrower dimension of a conventional two by four wood beam snugly therebetween.
Fastener apertures are located in both end portions 58 for securement to an upright two by four beam received therebetween when k>eing supported adjacent an upright wall structure as in Figure 1. Planking material in the wall positian is arranged to span between the upper surfaces 56 of the wall arms 52 of adjacent scaffolding elements.
Height of the planking material is thus adjusted by selecting a desired longitudinal position of the wall are along the upright and by subsequent securement of the wall arm in a fixed position by releasable pins 60 received through the co-operating apertures.
Using the companents described herein, the scaffolding elements 10 can be used in either the wall position ar the roof position as shown in the accompanying figures. In the wall position, attachment of both the wall arm and the base arm to a framed wall structure permits an interior perimeter wall scaffold to be formed in which a work platform is provided for use by workers to layout and set trusses on the exterior walls of a building structure from within the interior of the structure. Accordingly workers are not required to balance along the top edges of perimeter walls when setting roof trusses as was previously required.
Additional work in the general area at the base of the roof, including installation of fascia boards and initial sheathing on the roof structure, can also be readily accomplished.
Once the initial installation phases of a roof structure are completed the scaffolding elements may be removed from the wall position and reassembled in the roof position along the base of the roof structure as a temporary fall restraint and perimeter guard rail system. When assembled in the roof position, the auxiliary wall arm 52 is preferably removed so that railing elements rnay be readily installed. The adjustable nature of the base arm also permits a level work platform when operating through a broad range of roof inclinations. ~ecurement of the pivot plate to the roof structure is preferably accomplished by eight #12 two and a half inch long wood screws. The wood screws are installed through the pivot plate and into the roof sheathing and a truss supporting the sheathing thereon. Once the first row of sheathing is installed the scaffolding elements can readily be pasitioned in the roof position thereon. Each of the co-operating apertures in the upright for alignment with the apertures formed at the inner end of the base arm corresponds to a conventional roof inclination. These include four by twelve slopes as well as six by twelve, eight by twelve, ten by twelve and twelve by twelve slopes. The use of the anchor pin secures the base arm at the selected corresponding inclination. The scaffolding elements are preferably supported on the roof structure no more than three meters or ten feet apart using the wand screws received through the pivot plate as noted above. Once the scaffolding elements are fixed on the supporting surface of the roof structure, two rows of two by ten planking material are preferably supported on the base arms in side by side configuration. A guard rail ar railing elements can then be installed by slidably receiving the elements through the appropriate railing apertures formed in the upright. 'fhe railing elements may be secured to the uprights by fasteners received in the apertures in the rail support plate as desired. Height of the railing spanning between each pair of adjacent scaffolding elements preferably alternates being received in the railing apertures from adjacent pairs of scaffolding elements to form a generally consistent barrier of railing elements spanning all scaffolding elements.
The scaffolding elements are intended to be a readily affordable scaffold system for use either adjacent wall structures ar as a fall restraint system on a roof structure. The scaffolding elements are not intended to be a heavy duty support for supporting considerable work materials thereon but is rather intended to mostly support the weight of one or more workers thereon.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. The invention is to be considered limited solely by the scope of the appended claims.
Claims (23)
1. A scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
and a base arm supported an the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface, the base arm being supported for sliding movement in the longitudinal direction of the upright;
the scaffolding elements being usable in:
a roof position in which there is provided anchoring means for selectively restricting movement of each base arm in relation to the respective upright for supporting the uprights on an inclined supporting surface comprising a roof structure whereby the planking material may be supported to span between the base arms of the scaffolding elements; and a wall position in which there is provided an auxiliary arm for being supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement to the supporting surface whereby the free ends of both the base arm and the auxiliary arm of each upright may be secured to an upright supporting surface comprising a wall structure and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
an elongate upright extending in a respective longitudinal direction;
and a base arm supported an the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface, the base arm being supported for sliding movement in the longitudinal direction of the upright;
the scaffolding elements being usable in:
a roof position in which there is provided anchoring means for selectively restricting movement of each base arm in relation to the respective upright for supporting the uprights on an inclined supporting surface comprising a roof structure whereby the planking material may be supported to span between the base arms of the scaffolding elements; and a wall position in which there is provided an auxiliary arm for being supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement to the supporting surface whereby the free ends of both the base arm and the auxiliary arm of each upright may be secured to an upright supporting surface comprising a wall structure and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
2. The system according to Claim 1 wherein the mounting means at the free end of each base arm comprises a mounting plate having mounting apertures therein and which is supported for relative pivotal movement on the base arm.
3. The system according to Claim 2 wherein the mounting plate of each base arm is pivotal through a range of inclinations relative to the base arm including a wall position in which the mounting plate lies substantially parallel to the longitudinal direction of the respective upright.
4. The system according to Claim 1 wherein the base arm of each scaffolding element includes a tube for slidably receiving of the respective upright therethrough, the tube and upright having respective mating cross-sections for restricting relative rotation therebetween.
5. The system according to Claim 1 wherein each scaffolding element includes a foot support fixed to a bottom end of the upright, opposite the auxiliary arm and lying perpendicularly to the longitudinal direction of the upright.
6. The system according to Claim 1 wherein the upright of each scaffolding element includes a plurality of railing apertures spaced apart in the longitudinal direction and formed to extending through the upright transversely to a direction of the respective base arm, the railing apertures being arranged to slidably receive railing members therethrough which span between adjacent scaffolding elements.
7. The system according to Claim 1 wherein the auxiliary arm of each scaffolding element is supported for sliding movement in the longitudinal direction of the respective upright and wherein there is provided anchoring means for selectively restricting movement of the auxiliary arm in relation to the respective upright.
8. A scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface, the base arm being supported for sliding movement in the longitudinal direction of the upright; and anchoring means far selectively restricting movement of each base arm in relation to the respective upright for supporting the uprights on an inclined supporting surface comprising a roof structure;
whereby the planking material may be supported to span between the base arms of the scaffolding elements.
an elongate upright extending in a respective longitudinal direction;
a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface, the base arm being supported for sliding movement in the longitudinal direction of the upright; and anchoring means far selectively restricting movement of each base arm in relation to the respective upright for supporting the uprights on an inclined supporting surface comprising a roof structure;
whereby the planking material may be supported to span between the base arms of the scaffolding elements.
9. The system according to Claim 8 wherein the mounting means at the free end of each base arm comprises a mounting plate having mounting apertures therein and which is supported for relative pivotal movement on the base arm.
10. The system according to Claim 9 wherein the mounting plate of each base arm is pivotal through a range of inclinations relative to the base arm including a wall position in which the mounting plate lies substantially parallel to the longitudinal direction of the respective upright.
11. The system according to Claim 8 wherein the base arm of each scaffolding element includes a tube for slidably receiving of the respective upright therethrough, the tube and upright having respective mating cross-sections for restricting relative rotation therebetween.
12. The system according to Claim 8 wherein each scaffolding element includes a foot support fixed to a bottom end of the upright, opposite the auxiliary arm and lying perpendicularly to the longitudinal direction of the upright.
13. The system according to Claim 8 wherein the upright of each scaffolding element includes a plurality of railing apertures spaced apart in the longitudinal direction and formed to extending through the upright transversely to a direction of the respective base arm, the railing apertures being arranged to slidably receive railing members therethrough which span between adjacent scaffolding elements.
14. The system according to Claim 8 wherein there is provided an auxiliary arm supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement of both the base arm and the auxiliary arm of each upright to an upright supporting surface comprising a wall structure and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
15. The system according to Claim 8 wherein the auxiliary arm of each scaffolding element is supported for sliding movement in the longitudinal direction of the respective upright and wherein there is provided anchoring means for selectively restricting movement of the auxiliary arm in relation to the respective upright.
16. A scaffold system comprising a plurality of scaffolding elements for supporting planking material spanning between adjacent scaffolding elements, each scaffolding element comprising:
an elongate upright extending in a respective longitudinal direction;
a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface; and an auxiliary arm far being supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement to the supporting surface;
whereby the free ends of both the base arm and the auxiliary arm of each upright may be secured to an upright supporting surface comprising a wall structure; and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
an elongate upright extending in a respective longitudinal direction;
a base arm supported on the upright to project outwardly transversely to the longitudinal direction to a free end spaced outwardly from the upright, the free end of the base arm including mounting means for securement to a supporting surface; and an auxiliary arm far being supported on each upright spaced in the longitudinal direction from the base arm to project laterally outwardly to a free end spaced outwardly from the upright, the free end of the auxiliary arm including mounting means for securement to the supporting surface;
whereby the free ends of both the base arm and the auxiliary arm of each upright may be secured to an upright supporting surface comprising a wall structure; and whereby the planking material may be supported to span between the auxiliary arms of adjacent scaffolding elements.
17. The system according to Claim 16 wherein the auxiliary arm of each scaffolding element is supported for sliding movement in the longitudinal direction of the respective upright and wherein there is provided anchoring means for selectively restricting movement of the auxiliary arm in relation to the respective upright.
18. The system according to Claim 16 wherein the base arm is supported for sliding movement in the longitudinal direction of the upright and wherein there is provided anchoring means for selectively restricting movement of each base arm in relation to the respective upright for supporting the uprights on an inclined supporting surface comprising a roof structure whereby the planking material may be supported to span between the base arms of the scaffolding elements.
19. The system according to Claim 16 wherein the mounting means at the free end of each base arm comprises a mounting plate having mounting apertures therein and which is supported for relative pivotal movement on the base arm.
20. The system according to Claim 19 wherein the mounting plate of each base arm is pivotal through a range of inclinations relative to the base arm including a wall position in which the mounting plate lies substantially parallel to the longitudinal direction of the respective upright.
21. The system according to Claim 18 wherein the base arm of each scaffolding element includes a tube for slidably receiving of the respective upright therethrough, the tube and upright having respective mating cross sections for restricting relative rotation therebetween.
22. The system according to Claim 16 wherein each scaffolding element includes a foot support fixed to a bottom end of the upright, opposite the auxiliary arm and lying perpendicularly to the longitudinal direction of the upright.
23. The system according to Claim 16 wherein the upright of each scaffolding element includes a plurality of railing apertures spaced apart in the longitudinal direction and formed to extending through the upright transversely to a direction of the respective base arm, the railing apertures being arranged to slidably receive railing members therethrough which span between adjacent scaffolding elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002423411A CA2423411A1 (en) | 2003-04-04 | 2003-04-04 | Scaffold system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002423411A CA2423411A1 (en) | 2003-04-04 | 2003-04-04 | Scaffold system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2423411A1 true CA2423411A1 (en) | 2003-06-23 |
Family
ID=4171261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002423411A Abandoned CA2423411A1 (en) | 2003-04-04 | 2003-04-04 | Scaffold system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2423411A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764502A (en) * | 2020-06-30 | 2020-10-13 | 首钢水城钢铁(集团)赛德建设有限公司 | Bolt ball net rack and splicing method thereof |
-
2003
- 2003-04-04 CA CA002423411A patent/CA2423411A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764502A (en) * | 2020-06-30 | 2020-10-13 | 首钢水城钢铁(集团)赛德建设有限公司 | Bolt ball net rack and splicing method thereof |
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