US20040117928A1 - Bridge platform - Google Patents
Bridge platform Download PDFInfo
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- US20040117928A1 US20040117928A1 US10/732,879 US73287903A US2004117928A1 US 20040117928 A1 US20040117928 A1 US 20040117928A1 US 73287903 A US73287903 A US 73287903A US 2004117928 A1 US2004117928 A1 US 2004117928A1
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- bridge
- cables
- flooring
- platform
- sections
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/106—Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges
Definitions
- FIG. 1 is a fragmentary side elevational view, partly diagrammatic, of a bridge having a platform according to the present invention installed thereon;
- cables 70 a - 70 g are attached at opposite ends to piers 18 and 20 by compression clamp assemblies which will be described.
- the platform flooring generally designated 74 in FIG. 2, rests on and is supported by cables 70 a - 70 g .
- Flooring 74 comprises a plurality of sections or panels each releasably connected to corresponding cables 70 in a manner which will be described in detail presently.
- Some of the connector assemblies i.e. those designated 172 in FIG. 3, also have the capability of an additional or auxiliary connection to the bridge structural steel 14 and will be described in detail presently.
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Abstract
A bridge platform and method of erecting the same wherein a plurality of cables extend longitudinally of the bridge in spaced relation below the deck or roadway and steel support structure of the bridge, which cables are supported at opposite ends by the spaced-apart vertical piers of the bridge, and wherein a plurality of platform flooring panels or sections are supported on the cables, extend laterally of the bridge, are arranged side-by-side along the length of the bridge between the piers and are removably secured to the cables. The cables are attached to the bridge piers by compression clamp structures. The platform flooring sections comprise elongated rectangular corrugated decking panels and are arranged in end-to-end overlapping relation transversely of the bridge, side-to-side overlapping relation longitudinally along the bridge and with the corrugations extending transversely of the cables. The corrugations maximize the strength-to-weight ratio of the platform flooring and provide recesses or receptacles to contain debris and facilitate its collection and removal. Each of the platform flooring sections is releasably connected at spaced locations to the supporting cables on which it rests. This is provided by connector assemblies each comprising a first part which engages the upper surface of the flooring section and the cable and a second part which engages the upper surface of the flooring section, the two parts being removably connected together through a small opening in the flooring. As a result, individual flooring sections can be removed to provide access through the flooring in emergency or critical situations while at the same time allowing the remainder of the flooring to retain collected debris.
Description
- This invention relates to the art of working platforms for supporting persons performing work on structures, and more particularly to a new and improved platform installed below the deck or roadway of a bridge.
- It is necessary to periodically clean and repaint the surfaces of steel bridges to prevent corrosion and deterioration of the steel supporting structure. This, in turn, creates the need to provide a safe and effective support for workmen performing the cleaning and painting of the surfaces beneath the deck or roadway of the bridge. In addition, environmental concerns and regulations give rise to the need for containing the debris from the cleaning operation as well as paint residue and spillage.
- A number of bridge platforms have been proposed but many are complex structures and time consuming to erect and dismantle. Other prior art platforms are not sufficiently rigid or are limited in height, i.e., the distance between platform flooring and bridge steel structure, due to the manner in which they are attached to the bridge. Some prior platforms extend for only a short distance longitudinally of the bridge and are limited in that respect.
- It would, therefore, be highly desirable to provide a new and improved bridge platform and method of erecting the same which is safe, provides a sufficiently rigid support for workman standing and walking thereon, which is simple in structure, light in weight, and therefore quick, easy and economical to erect and dismantle, which extends for a significant portion of the length of the bridge and which is effective in containing debris from the cleaning and painting operations performed on the bridge.
- The present invention provides a bridge platform and method of erecting the same wherein a plurality of cables extend along a section of the bridge in spaced relation below the deck or roadway and steel support structure of the bridge, which cables are supported at opposite ends by a structure of the bridge such as the spaced-apart vertical piers of the bridge, and wherein a plurality of platform flooring panels or sections are supported on the cables, extend laterally of the cables, are arranged side-by-side along the section of the bridge such as between the piers and are removably secured to the cables. The cables preferably are attached to the bridge piers by compression clamp structures. The platform flooring sections comprise elongated rectangular corrugated decking panels and are arranged in end-to-end overlapping relation transversely of the cables, side-to-side overlapping relation along the bridge and with the corrugations extending transversely of the cables. The corrugations maximize the strength-to-weight ratio of the platform flooring and provide recesses or receptacles to contain debris and facilitate its collection and removal. Each of the platform flooring sections is releasably connected at spaced locations to the supporting cables on which it rests. This is provided by connector assemblies each comprising a first part which engages the upper surface of the flooring section and the cable and a second part which engages the upper surface of the flooring section, the two parts being removably connected together through a small opening in the flooring. As a result, individual flooring sections can be removed to provide access through the flooring in emergency or critical situations while at the same time allowing the remainder of the flooring to retain collected debris.
- The foreg ing and additional advantages and characterizing features of the present invention will become clearly apparent upon a reading of the ensuing detailed description wherein:
- FIG. 1 is a fragmentary side elevational view, partly diagrammatic, of a bridge having a platform according to the present invention installed thereon;
- FIG. 2 is a fragmentary cross-sectional view, partly diagrammatic, of the bridge platform of FIG. 1;
- FIG. 3 is a plan view of the bridge platform of FIG. 1;
- FIG. 4 is a fragmentary side elevational view of a clamp assembly in the bridge platform of FIGS.1-3;
- FIG. 5 is a fragmentary plan view of the clamp assembly of FIG. 4;
- FIG. 6 is an enlarged fragmentary plan view of a portion of the assembly of FIG. 5;
- FIG. 7 is an enlarged fragmentary plan view of another portion of the assembly of FIG. 5;
- FIG. 8 is a plan view of one of the sections of flooring of the platform of the present invention as it appears resting on the supporting cables;
- FIG. 9 is an end view of the platform section shown in FIG. 8;
- FIG. 10 is a side elevational view of the flooring section of FIG. 8 with connect r assemblies installed thereon for securing the flooring to the cable;
- FIG. 11 is an enlarged fragmentary side elevational view of one of the connector assemblies of FIG. 10;
- FIG. 12 is a side elevational view of one part of the connector assembly included in the platform of the present invention;
- FIG. 13 is a plan view of the connector assembly of FIG. 12;
- FIG. 14 is a side elevational view of the second part of the connector assembly of the present invention;
- FIG. 15 is a plan view of the connector assembly of FIG. 14; and
- FIG. 16 illustrates the platform of the present invention in combination with tarpaulin enclosures.
- Referring first to FIG. 1, there is shown a portion of a
bridge 10 including a deck orroadway 12 supported bystructural steel 14 which, in turn, is supported above theground 16 by concrete piers or pedestals at regular intervals along the length f the bridge. Twopiers railing 24 is shown extending along the length ofbridge deck 12. Theplatform 30 of the present invention in the situation illustrated herein is located below thebridge deck 12 and between thepiers piers structural steel 14. Theplatform 30, which will be described presently, includes a plurality of cables (not shown in FIG. 1) extending lengthwise ofbridge 10 and supported at opposite ends bypiers bridge 10, and the sections are in side-by-side relation along the length ofbridge 10. Each flooring section is removably connected at spaced locations thereon to the cables. The platform also is supported at spaced locations therealong by the bridgestructural steel 14 by means of support cables, some of which are designated 32 in FIG. 1. While the present description is directed to thesingle platform 30, a plurality of platforms, three of which are designated 30′, 30″ and 30′″ in FIG. 1 can be provided along the length ofbridge 10. - Referring now to FIG. 2, there is shown one of the bridge piers, for
example pier 20, which has a pair of vertical pedestals orcolumns structural steel 14 includessidewalls pedestals bridge 10 by a series of assemblies each including ahorizontal frame member 54 andinclined frame members 56 and 58 joined at the lower ends to acentral plate 60 fixed toframe member 54 and joined at the upper ends to thecorresponding sidewalls deck 12 is supported by the combination of the piers andsteel walls walls - As shown in FIG. 2, the supporting
cables 70 of theplatform 30 of the present invention extend longitudinally ofbridge 10 between the piers and are spaced apart substantially equally in a transverse direction relative tobridge 10. Thus,cables 70 are disposed in a plane substantially parallel to the plane ofbridge deck 12. By way of example, in an illustrative bridge having a width of about 32 feet and a distance between piers of about 140 feet, sevensteel cables 70 a-70 g each one-half inch in diameter are provided. Thecables 70 are secured to a structure ofbridge 10 so that the plane of the cables is at a desired distance below the portion ofbridge 10 upon which work is to be performed. In the platform of the present illustration,cables 70 a-70 g are attached at opposite ends topiers cables 70 a-70 g. Flooring 74 comprises a plurality of sections or panels each releasably connected tocorresponding cables 70 in a manner which will be described in detail presently. - The plan view of FIG. 3 illustrates the clamping assemblies for attaching opposite ends of
cables 70 to thebridge piers pedestals pier 20 are shown in FIG. 3. Pier 18 likewise has two pedestals designated 76 and 78 in FIG. 3. A first compression clamping assembly generally designated 80 secures all of thecables 70 at one end thereof, i.e. the left-hand end as viewed in FIG. 3, topedestals pier 20. A second compression clamping assembly generally designated 82 and identical toassembly 80 secures all of thecables 70 at the opposite end thereof, i.e. the right-hand end as viewed in FIG. 3, topedestals pier 20.Clamping assembly 80 comprises a first member or I-beam 86 extending transversely ofbridge 10 and contacting bothpedestals beams pedestals Members pedestal 76 by a plurality of threaded connectingrods 92 which are tightened to provide the required amount of compression force. Similarly,members pedestal 78 by a plurality of threaded connectingrods 94 which are tightened to provide the required amount of compression force. Thus, I-beam 86 contacts the left-hand surfaces ofpedestals beams pedestals Cables beams remaining cables beam 86. The clamping assembly and the manner of connectingcables 70 thereto will be described in further detail presently. - In a similar manner, clamping
assembly 82 comprises a first member or I-beam 106 extending transversely ofbridge 10 and contacting bothpedestals beams pedestals Members pedestal 42 by a plurality of threaded connectingrods 112 which are tightened to provide the required amount of compression force. Similarly,members pedestal 44 by a plurality of threaded connectingrods 114 which are tightened to provide the required amount of compression force. Thus, I-beam 106 contacts the right-hand surfaces ofpedestals beams pedestals Cables beams cables beams 106. - FIG. 4 illustrates in further detail a portion of one of the clamping assemblies, in particular the portion of clamping
assembly 80 associated withpedestal 78 ofpier 18. The arrangement illustrated in FIG. 4 is substantially similar to the portion ofclamp assembly 80 associated withpedestal 76 ofpier 18 and to the portions ofclamps assembly 82 associated withpedestals pier 20. As shown in FIG. 4,pedestal 78 is provided with acap 120 on which is mounted abeam bearing structure 124 on which agirder 126 of thesidewall 52 rests. I-beam 86 ofclamp assembly 80 contacts the left-hand surface ofpedestal cap 120 as viewed in FIG. 4 and I-beam 90 of the clamp assembly contacts the opposite or right-hand surface ofcap 120. A pair of threaded connectingrods 94 join the flange ofbeams pedestal cap 120 and a similar pair of connecting rods (not shown in FIG. 4) join the flanges ofbeams cap 120. The connection ofcable 70 f tobeam 90 is provided by a plate-like extrusion 130 on the outer flange ofbeam 90 and ashackle 132 which fits in an opening inplate 130 and is connected by a cable clamps 134 to the end ofcable 70 f. - As shown in FIGS. 5 and 6,
extension 130 which is welded to the flange ofbeam 90 is provided with anopening 138 to receiveshackle 132. A shown in FIGS. 5 and 7, I-beam 90 is provided with reinforcingspacers 140 adjacent theopenings 142 in the flanges through whichrods 94 extend.Rods 94 are provided with washers (not shown),nuts 144 andcotter pins 146 on each end thereof as shown in FIG. 5. By way of example, in an illustrative bridge platform, I-beams beams rods shackles 132 are ⅝ inch diameter, clamps 134 are MIH ⅝ inch cable clamps andcables 70 are ⅝ inch diameter wire rope cables each having 6×19 IPS fiber core. - In the
bridge 10 of the present illustration, each pier has two bearingstructures 124, one on each pier pedestal. Some bridges have a large number of bearing structures per pier, for example six, in which case thecables 70 could be secured to the bearing structures without the need for theclamping assemblies - Referring again to FIG. 3, the platform flooring74 comprises a plurality of elongated rectangular panels each designated 160 which are arranged in end-to-end overlapping relation transversely of
bridge 10 andcables 70, as indicated by thebroken lines 162 in FIG. 3, and whichpanels 160 are arranged in side-by-side overlapping relation longitudinally ofbridge 10 andcables 70, as indicated by thebroken lines 164 in FIG. 3.Panels 160 are corrugated decking panels with the corrugations extending transversely ofcables 70 as indicated at 166 in FIG. 3. Havingcorrugations 166 extending transversely ofcables 70 maximizes the rigidity and strength of flooring 74 and prevents any buckling of thepanels 160. Each of the platform flooring sections orpanels 160 is releasably connected at spaced locations to the supportingcables 70 on which it rests. This is provided by connector assemblies generally indicated at 170 in FIG. 3 and which will be described in detail presently. As a result, individual flooring sections orpanels 160 can be removed to provide access through the flooring in emergency situations. For example, if a worker becomes seriously ill or injured, one ormore flooring sections 160 can be quickly and easily removed thereby allowing the worker to be lowered safely to the ground below. In addition, collected debris remains in the corrugations of the removed panel and is not lost from containment within the area of the platform. - Some of the connector assemblies, i.e. those designated172 in FIG. 3, also have the capability of an additional or auxiliary connection to the bridge
structural steel 14 and will be described in detail presently. - FIG. 8 shows in further detail two laterally adjacent panels designated160 a and 160 b and their association with two of the supporting cables, for
example cables Panel 160 a has a pair of side edges 180 a, 182 a which are joined by a pair of end edges 184 a, 186 a. Corrugations 166 a extend longitudinally alongpanel 160 a and substantially parallel toside edges 180 a, 182 a. As shown in FIG. 8 thecorrugations 166 of all thepanels 160 in flooring 74 extend transversely ofcables 70 so as to provide the required strength and rigidity of theplatform 30. The corrugations 166 a ofpanel 160 a are shown in further detail in the end view of FIG. 9. - Similarly,
panel 160 b has a pair of side edges 180 b, 182 b which are joined by a pair of end edges 184 b, 186 b. Corrugations, 166 b extend longitudinally alongpanel 160 b and substantially parallel toside edges 180 b, 182 b. Thepanels - Each of the
panels 160 comprising flooring 74 includes a plurality of openings extending therethrough for making connection tocables 70. The number and location of openings will depend upon the size ofpanels 160 and the distance between cables. In the panels illustrated in FIG. 8,panel 160 a includes a first pair ofopenings 190 a located nearend 184 a and a second pair ofopenings 192 a located nearend 186 a. Similarly,panel 160 b includes a first pair of openings 192 b located nearend 184 b and a second pair of openings (not shown) located near end 186 b.Openings 192 a inpanel 160 a are in alignment with openings 194 b inpanel 160 b. Each of the openings, for example opening 190 a, is elongated and disposed with the longitudinal axis thereof substantially parallel tocorrugation 166 and thustransversely f cables 70. - As shown in FIG. 10, the openings in the
panels 160 enable theconnector assemblies cables 70 andpanels 160 in a manner releasably connecting the panels to the cables. In particular,connector assembly 170 includes afirst part 200 which engages theupper surface 202 ofpanel 160 and which also engages thecable 70 and asecond part 204 which engages theupper surface 202 ofpanel 160, the two parts being removably connected together through opening 190 in a manner which will be shown and described in detail presently. Similarly,connector assembly 172 includes afirst part 206 which engages theupper surface 202 ofpanel 160 and which also engages thecable 70 and asecond part 208 which engages theupper surface 202 ofpanel 160, the two parts being removably connected together through opening 192 in a manner which will be described in detail presently. Thefirst part 206 ofconnector assembly 172 is identical to thefirst part 200 ofconnector assembly 170. Thesecond part 208 ofconnector assembly 172 is provided with aneyelet 210 for connection to one end of an auxiliary cable, not shown in FIG. 10, the other end of which is connected to the bridgestructural steel 14 such as are of the frame assemblies shown in FIG. 2. For convenience in illustration, bothconnector assemblies single panel 160 tocables 70. However, theconnector assemblies adjacent panels 160 tocables 70 as shown in FIG. 3. - The
connector assembly 172 is shown in further detail in the enlarged view of FIG. 11. Thefirst part 206 comprises a plate-like body 216 an a substantiallyU-shaped hook formation 218 which extends therefrom for engagingcable 70 and which is provided with a threadedend portion 220 which projects through an opening (not shown in FIG. 11) in the plate-like body 222 of thesecond part 208 ofassembly 172. Anut 224 fastens the two parts together. - FIGS. 12 and 13 show in further detail the
first part 206 ofconnector assembly 172. As previously mentioned, thefirst part 206 ofconnector assembly 172 is identical to thefirst part 200 ofconnector assembly 170. The plate-like body 216 ofpart 206 is elongated rectangular in shape having oppositely directedsurfaces 230 and 232 bounded by a pair of side edges 234 and 236 joined by a pair of end edges 238 and 240. TheU-shaped hook formation 218 has oneend 242 welded or otherwise joined as indicated at 244 to surface 232 ofbody 216 at a location slightly inwardly ofend 240 and midway betweensides 234 and 236. Theother end 246 offormation 218 extends beyondsurface 230 as shown in FIG. 12. The threadedend portion 220 extends inwardly fromend 246. For convenience in illustration, onlypart 206 ofconnector assembly 172 is shown in FIGS. 12 and 13, it being understood thatpart 200 ofconnector assembly 170 is identical. - FIGS. 14 and 15 show in further detail the
second part 208 ofconnector assembly 172. The plate-like body 222 ofpart 208 is elongated rectangular in shape having oppositely-directedsurfaces opening 262 is provided throughbody 222 at a location betweensides end 220 in a close, sliding relation.Nut 224 shown in FIG. 14 is threaded onend 220 ofhook formation 218 to fasten the twoconnector parts Body 222 is provided with a foot-plate 263 welded or otherwise fixed to thelower surface 252 to stabilize its placement onplate 216 ofconnector part 206 and onupper surface 202 ofpanel 160. The structure ofpart 208 shown and described up to this point is identical topart 204 ofconnector assembly 170. -
Part 208 ofconnector assembly 172 is provided with aU-shaped eyelet member 210 which is welded or otherwise joined as indicated at 264 to surface 250 ofbody 222 at a location between opening 262 andedge 260.Eyelet 210 receives one end of an additional or auxiliary supporting cable (not shown in FIGS. 14 and 15), the other end of which is secured to the bridgestructural steel 14 including the frames shown in FIG. 2. Examples of such auxiliary cables are thecables 32 shown in FIGS. 1 and 2. - The platform sections or
panels 160 and theconnector assemblies platform 30 in the following manner. Thepanels 160 are placed and arranged on thecables 70 by workmen using scaffolds or the like supported by thebridge 10.Panels 160 are placed on the supportingcables 70 so that thecorrugations 166 are disposed transversely of thecables 70.Panels 160 are arranged in a row and in end-to-end overlapping relation transversely of thecables 70. Thepanels 160 are located so that theopenings 190, 192 are aligned with various ones of thecables 70 as shown in FIG. 8. Furthermore, with adjacent ones of thepanels 160 being in end-to-end overlapping relation, theopenings 190, 192 of the overlapping portions ofadjacent panels 160 in a row are aligned with each other and with the correspondingcables 70. - Next, the
connector assemblies first part 200 ofconnector assembly 170 is manipulated with the flat base inclined upwardly from theupper surface 202 ofpanel 160 so that the U-shaped hook formation ofpart 200 can be inserted through the opening inpanel 160 and around thecable 70. Then the flat base is pivoted or otherwise manipulated so thatcable 70 is within the U-shaped hook formation and the threaded end of the U-shaped hook extends upwardly fromsurface 202 as shown in FIG. 10. Then, thesecond part 204 is placed onsurface 202 ofpanel 202 and on the base plate of thefirst part 202 so that the threaded end of the hook formation extends up through the opening in the base of the second part. Thennut 224 is threaded on the end of the hook formation and tightened onto the base of thesecond part 204 to hold the two parts of theconnector assembly 170 together and in secure engagement withpanel 160 andcable 70. - The foregoing operation is repeated for each of the connector assemblies in each of the panels along the row. Then the
panels 160 of the next row are installed, the row extending transversely of thecables 70 and the panels of the next row being adjacent sideways to the panels of the first row. The panels of this next row are in end-to-end overlapping relation in the same manner as the panels of the first row. In addition, the panels of this next row are in side-to-side overlapping relation with the panels of the first row as shown in FIG. 3. The connector assemblies are installed in the panels of this next row in a manner similar to that of the first row. The foregoing installation of rows ofpanels 160 and installation of connector assemblies is continued in a direction longitudinally of thecables 70 until theplatform 30 is completed.Connector assemblies 172 of the second type are installed at spaced locations, for example about 20 feet, over the surface ofplatform 30, and auxiliary cables such ascables 32 are connected between theassemblies 172 and bridgestructural steel 32. - As previously described, the platform flooring74 and particularly the
corrugations 166 ofpanels 160 are very effective in containing debris such as paint chips removed from thebridge steel 14 and frames thereof as well as paint droppings or spillage during the actual painting operation. In some situations, particularly under windy conditions, it is necessary to take extra measures to confine the debris and paint and prevent its movement or escape due to wind or other effects. Accordingly, an enclosure is defined betweenplatform 30 and the bridge by means of tarpaulins as shown in FIG. 16. In particular,tarpaulin enclosures platform 30. The lower end oftarpaulin enclosure 270 is fastened to the side edge ofplatform 30 by lumber stripping 274 or the like screwed to thepanels 160 ofplatform 30 to provide a continuous seal. The upper end oftarpaulin enclosure 270 extends over thebridge railing 24 and is fastened to thebridge deck 12 or sidewalk thereof by the combination ofcable 276 extending along the deck and lumber stripping 278 or the like secured to the deck. Similarly,tarpaulin enclosure 272 is fastened at the lower end toplatform 30 by stripping 280 and at the upper end todeck 12 bycable 282 and stripping 284. If desired, similar tarpaulin enclosures can be provided at opposite ends ofplatform 30. Thus,platform 30, the tarpaulin enclosures and thebridge deck 12 define a confined region or volume for containing debris from the operations being performed. - By way of example, in an illustrative platform, the overall width is about 32 feet or slightly less than the width of the
bridge deck 12 and the overall length of the platform is about 140 feet which is approximately the span betweenpiers Panels 160 are rigid type B corrugated steel decking panels each 11 feet in length and 3 feet in width. Thepanels 160 are 22 gage, 1½ inch deep ASTM A446 steel having a yield strength of FY=33KSI (minimum). A minimum panel overlap of 6 inches in longitudinal and lateral directions is provided.Cables 70 are seven in number, each ½ inch in diameter and spaced apart about 5 feet.Cables 70 are 6×19 IWRC cable of plain steel with a breaking strength of 41,200 pounds or greater. Eachpanel 160 is connected at two locations to the corresponding cable. The location ofplatform 30 is about 11½ feet belowbridge deck 12. The typical maximum applied load for whichplatform 30 is designed is 11 pounds per square foot. Thecables 70 are supported every 20 feet by the auxiliary support cables such as those designated 32. -
Platform 30 of the present invention by virtue of the combination ofsupport cables 70 andcorrugated decking panels 160 is safe, provides a sufficiently rigid support for workmen to stand and walk on and is relatively simple in structure and light in weight. Rigidity is important in that workmen can walk alongplatform 30 with no lowering. Thecorrugations 166 enhance the strength to weight ratio ofpanels 160. In addition, the corrugations facilitate containment of debris. The provision ofconnector assemblies openings 190 and 192 in the panels provide a quick, easy and effective way to both erect and dismantle the bridge platform of the present invention. The provision ofindividual panels 160 releasably connected tocables 70 provides convenient and quick access through the flooring 74 in emergency situations. Thus in such situations it is not necessary to cut through the platform flooring which otherwise could destroy the integrity of debris containment provided by enclosures such as that shown in FIG. 16. Furthermore, the time required to cut through flooring could have serious consequences in emergency and critical situations, and such cutting could impair the structural integrity of the platform and therefore its safety. - It is therefore apparent that the present invention accomplishes its intended objects. While an embodiment of the present invention has been described in detail that is for the purpose of illustration and not limitation.
Claims (14)
1. A platform for installation below the deck of a bridge and extending along a section of the bridge for supporting persons performing work on the bridge and for collecting debris resulting from the work, said platform comprising:
a) a plurality of cables extending along the bridge and in spaced relation to each other and in a plane substantially parallel to the plane of the deck;
b) means at each end of said cables for securing said cables to the bridge so that the plane of the cables is at a desired distance below the portion of the bridge upon which work is to be performed;
c) a plurality of flooring sections each extending transversely of the cables and resting on said cables, said flooring sections being arranged in side-by-side relation longitudinally of the cables; and
d) means for releasably securing said flooring sections to said cables.
2. A bridge platform according to claim 1 , wherein said means for securing said cables to the bridge secures said cables to spaced-apart piers of the bridge.
3. A bridge platform according to claim 2 , wherein said means for securing said cables to the bridge piers comprises a pair of compression clamp structures, one on each of the piers, and said cables are connected at opposite ends thereof to said clamp structures.
4. A bridge platform according to claim 1 , wherein said flooring sections comprise elongated rectangular decking panels arranged in end-to-end overlapping relation transversely of the cables and in side-to-side overlapping relation longitudinally of the cables.
5. A bridge platform according to claim 4 , wherein said decking panels are corrugated with the corrugations extending transversely of the cables.
6. A bridge platform according to claim 1 , wherein said flooring sections comprise corrugated elongated rectangular decking panels with the corrugations extending transversely of the cables.
7. A bridge platform according to claim 1 , wherein said means for releasably securing said flooring sections to said cables comprises a plurality of connector assemblies each comprising a first part which engages the upper surface of the flooring section and the cable, a second part which engages the upper surface of the flooring section and means extending through the flooring section for releasably connecting the two parts together.
8. A bridge platform according to claim 7 , wherein said first part comprises a plate-like body and a substantially U-shaped hook formation extending from said body for engaging the cable and having a threaded free end and wherein said second part comprises a plate-like body having an opening therethrough for receiving therethrough said threaded end of said hook formation of said first part so that a nut can be threaded or said free end to fasten said first and second parts together.
9. A bridge platform according to claim 7 , wherein some of said connector assemblies further include means for connection to one end of an auxiliary supporting cable, the other end of which is secured to the bridge to provide additional support for said platform.
10. A bridge platform according to claim 1 , further including tarpaulin enclosures extending between said platform and the bridge for defining a region between said platform and the bridge which enhances containment of the debris.
11. A method for installing a platform below the deck of a bridge for supporting persons performing work on the bridge and for collecting debris resulting from the work, said method comprising the steps of:
a) providing a plurality of cables and securing the cables to the bridge so that they extend along the bridge and in spaced relation to each other and in a plane substantially parallel to the deck at a distance below the portion of the bridge upon which work is to be performed;
b) providing a plurality of flooring sections each comprising corrugated elongated rectangular decking panels wherein the corrugations extend along the length of the panel;
c) placing the flooring sections on the cables with the corrugations extending transversely of the cables and with the sections in end-to-end and side-to-side contacting relation to each other; and
d) fastening the flooring sections to the cables by means of releasable connector assemblies each engaging the flooring sections and a corresponding one of the cables.
12. A method according to claim 11 , wherein the cables are secured to neighboring piers of the bridge so that the platform extends between the neighboring piers.
13. A method according to claim 11 , wherein said flooring sections are arranged in end-to-end overlapping relation transversely of the cables and in side-to-side overlapping relation longitudinally of the cables.
14. A method according to claim 11 , wherein said flooring sections are fastened to the cables by placing a first part of a connector assembly so that a portion thereof is in engagement with the upper surface of the flooring section and another portion thereof is in engagement with the cable through an opening in the flooring section, placing a second part of the connector assembly in engagement with the upper surface of the flooring section and releasably connecting the first and second parts together.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/732,879 US20040117928A1 (en) | 1995-07-25 | 2003-12-10 | Bridge platform |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US08/506,685 US5730248A (en) | 1995-07-25 | 1995-07-25 | Bridge platform |
US08/912,405 US5921346A (en) | 1995-07-25 | 1997-08-18 | Bridge platform |
US09/352,227 US6135240A (en) | 1995-07-25 | 1999-07-13 | Bridge platform |
US09/695,338 US6302237B1 (en) | 1995-07-25 | 2000-10-24 | Bridge platform |
US10/732,879 US20040117928A1 (en) | 1995-07-25 | 2003-12-10 | Bridge platform |
Related Parent Applications (1)
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US09/695,338 Continuation US6302237B1 (en) | 1995-07-25 | 2000-10-24 | Bridge platform |
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US20040117928A1 true US20040117928A1 (en) | 2004-06-24 |
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US08/506,685 Expired - Lifetime US5730248A (en) | 1995-07-25 | 1995-07-25 | Bridge platform |
US08/888,271 Expired - Lifetime US6138793A (en) | 1995-07-25 | 1997-07-03 | Work platform for use on bridges |
US08/912,435 Expired - Lifetime US6003634A (en) | 1995-07-25 | 1997-08-18 | Bridge platform |
US08/912,405 Expired - Lifetime US5921346A (en) | 1995-07-25 | 1997-08-18 | Bridge platform |
US09/352,227 Expired - Lifetime US6135240A (en) | 1995-07-25 | 1999-07-13 | Bridge platform |
US09/695,338 Expired - Lifetime US6302237B1 (en) | 1995-07-25 | 2000-10-24 | Bridge platform |
US09/946,579 Abandoned US20020029932A1 (en) | 1995-07-25 | 2001-09-05 | Bridge platform |
US10/732,879 Abandoned US20040117928A1 (en) | 1995-07-25 | 2003-12-10 | Bridge platform |
Family Applications Before (7)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/506,685 Expired - Lifetime US5730248A (en) | 1995-07-25 | 1995-07-25 | Bridge platform |
US08/888,271 Expired - Lifetime US6138793A (en) | 1995-07-25 | 1997-07-03 | Work platform for use on bridges |
US08/912,435 Expired - Lifetime US6003634A (en) | 1995-07-25 | 1997-08-18 | Bridge platform |
US08/912,405 Expired - Lifetime US5921346A (en) | 1995-07-25 | 1997-08-18 | Bridge platform |
US09/352,227 Expired - Lifetime US6135240A (en) | 1995-07-25 | 1999-07-13 | Bridge platform |
US09/695,338 Expired - Lifetime US6302237B1 (en) | 1995-07-25 | 2000-10-24 | Bridge platform |
US09/946,579 Abandoned US20020029932A1 (en) | 1995-07-25 | 2001-09-05 | Bridge platform |
Country Status (7)
Country | Link |
---|---|
US (8) | US5730248A (en) |
EP (1) | EP0847471B1 (en) |
JP (1) | JPH11510225A (en) |
AT (1) | ATE268850T1 (en) |
AU (1) | AU720795B2 (en) |
DE (1) | DE69632688D1 (en) |
WO (1) | WO1997005348A1 (en) |
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US9388589B2 (en) | 2013-05-21 | 2016-07-12 | Safway Services, Llc | Work platform system including suspended paneled portion and method of implementing same |
US9410333B2 (en) | 2013-05-21 | 2016-08-09 | Safway Services, Llc | Work platform system including suspended paneled portion and method of implementing same |
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- 1996-07-24 EP EP96924693A patent/EP0847471B1/en not_active Expired - Lifetime
- 1996-07-24 WO PCT/US1996/012151 patent/WO1997005348A1/en active IP Right Grant
- 1996-07-24 JP JP9507701A patent/JPH11510225A/en active Pending
- 1996-07-24 AU AU65080/96A patent/AU720795B2/en not_active Expired
- 1996-07-24 AT AT96924693T patent/ATE268850T1/en not_active IP Right Cessation
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- 1997-07-03 US US08/888,271 patent/US6138793A/en not_active Expired - Lifetime
- 1997-08-18 US US08/912,435 patent/US6003634A/en not_active Expired - Lifetime
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Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7861346B2 (en) | 2005-06-30 | 2011-01-04 | Ail International Inc. | Corrugated metal plate bridge with composite concrete structure |
US8672092B2 (en) * | 2007-02-08 | 2014-03-18 | Interamerica Stage, Inc. | Wire rope tension grid improvements |
US20140144725A1 (en) * | 2007-02-08 | 2014-05-29 | Interamerica Stage, Inc. | Wire Rope Tension Grid Improvements |
US9938733B2 (en) * | 2007-02-08 | 2018-04-10 | Interamerica Stage, Inc. | Wire rope tension grid improvements |
US20080190044A1 (en) * | 2007-02-08 | 2008-08-14 | Mark Thomas Black | Wire rope tension grid improvements |
US9309633B2 (en) * | 2009-09-18 | 2016-04-12 | Paul Kristen, Inc. | Cable-panel connector for bridge platform or other scaffolding |
US20110085854A1 (en) * | 2009-09-18 | 2011-04-14 | Lambros Apostolopoulos | Cable-panel connector for bridge platform or other scaffolding |
US9217451B2 (en) * | 2010-09-17 | 2015-12-22 | Paul Kristen, Inc. | Non-complex cable to panel connector with inseparable parts |
US20140328619A1 (en) * | 2010-09-17 | 2014-11-06 | Paul Kristen, Inc. | Non-complex cable to panel connector with inseparable parts |
US9388589B2 (en) | 2013-05-21 | 2016-07-12 | Safway Services, Llc | Work platform system including suspended paneled portion and method of implementing same |
US9410333B2 (en) | 2013-05-21 | 2016-08-09 | Safway Services, Llc | Work platform system including suspended paneled portion and method of implementing same |
US9976264B2 (en) | 2013-05-21 | 2018-05-22 | Safway Services, Llc | Work platform system including suspended paneled portion and method of implementing same |
US10883233B2 (en) | 2013-05-21 | 2021-01-05 | Brandsafway Services Llc | Work platform system including suspended paneled portion and method of implementing same |
US10119229B1 (en) | 2015-04-27 | 2018-11-06 | New Access Solutions, Inc. | Work platform rail system |
Also Published As
Publication number | Publication date |
---|---|
US5921346A (en) | 1999-07-13 |
US20020029932A1 (en) | 2002-03-14 |
US6135240A (en) | 2000-10-24 |
AU720795B2 (en) | 2000-06-15 |
EP0847471A1 (en) | 1998-06-17 |
US5730248A (en) | 1998-03-24 |
US6302237B1 (en) | 2001-10-16 |
DE69632688D1 (en) | 2004-07-15 |
EP0847471A4 (en) | 1999-11-24 |
JPH11510225A (en) | 1999-09-07 |
US6138793A (en) | 2000-10-31 |
AU6508096A (en) | 1997-02-26 |
US6003634A (en) | 1999-12-21 |
ATE268850T1 (en) | 2004-06-15 |
WO1997005348A1 (en) | 1997-02-13 |
EP0847471B1 (en) | 2004-06-09 |
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Legal Events
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |