US1898668A - Floor construction or the like - Google Patents

Description

Feb. 2l, 1933.

.11. JoNEs TAL FLOOX CONSTRUCTION ORATHE LIKE 3 Sheets-Sheet l Filed JamA 25, 1931 JS 3 Z gwoewou 70mm Jaws Zer ? Jamlala,

a fhg/111.

Feb. 2l, 1933.

J. JoNEs ETAL 1,898,668 FLooR coNsTRUcrIoN on 'rms 1.1m:

-Fled June 25, 1931 3 Sheets-Sheet 2 IHRE/m E f: i

'A '-5 Jolees l VG; J0

Feb. 21, 1933.' JQNES E1- M V 1,898,668

I FLOOR coNsTRurIoN on THLIKF.I

Filed June 25, 1931 3 Sheets-Sheet 3 *fa/Q19@ latented v-Fel). -21, 1933Y UNITED STATES 'PATENT ori-ics JONATHAN JON AND lS'IIEBIII'G- JOHNSTON, BETHLEHEM, PENNSYLVANIA,

ASSIGfNORS TO MCCLINTIC-MABSHALL CORPORATION, Af CORPORATION OF PENN- SYLVANIA Application led .Tune 25, 1931. Serial No. 546,692.v

Our invention relates to reinforced. concreteslabs or plates and 1s more particularly adapted for use in constructing floors for bridges and buildings r for ceilings and like purposes which shall be light in weight, simple of application, durable, and

a permanent additipn to the general stiff-- in approximate contact and. lled with concrete or other material. These types have A the defect that the bottom elements thereof because an integral partthereof is a steei, plate bottom which has approximately equal 'Y tensile values in all horizontal directions.

One of the objects of our invention is tosecure a slab or `floor structure of maxi,

mum strength combined with a minimum weight at s reasonable a cost as possible, the reinforcing elements ofv which can be fabricated in a structural shop from standard structural material which can 'be assembled in the'shop or intheeld as desired. y

Another object of our invention is to form the slab with a continuous base plate to which reinforcing elements are attached which serves the double purpose of'a form kfor pouring the concrete as well as,a bottom for the nished slab. The continuity -of this piate, taken in conjunction with the interlo ng of the same with the joists gives a design of maximum distribution of strength and permits wide spacing lof* the Hoor stringers or supports.

extending the joists the full depth of the "taken on the line 8-8 of Fig. 7;

joists illustrated in Figs. 7 to 10; and

Another object of our invention relates to slab and securing the joists to the base plato in such a manner. as to carry the major portion of the shear between the stringers.

Another object of our invention relatesA to the manner of holding the joists in proper alignment in spaced relation to each other. Other objects of our invention will appear from the following description taken in connection with the annexed three sheets of drawings .forming part of this specification and in whichlike vcharacters of reference indicate like parts. l v v Figure 1 isa vertical section through a portion of a ioor structure taken on the line the floor structurev as shown in Fig. 1;

Fig. 3 is a detail vertical section of the reinforcing elements before the concrete is poured upon the base plate l between the Joists and tie-bars, drawn on a larger scale than those shown in Fi Figa 4 is a` section taken on the liue 4-4- of Fig.3; v

fFg. 5 is atop plan view of a portlon of the `base plate;

welding the-.tie-bars to the joists;

AFi 6 illustrates two different ways of' enV . va5 i Fig. 2 is a top plan view of a portion of l. and 2.- The f section being taken on the line 3-3 .of Flg.` 4. A

Fig. 6a illustrates another manner of Welding the tie-bars to the joists and the tenons to the base plate; d

Fig. 7 is a vertical section of a modified vform vof floor structure taken on the lline 7-'-7'of`Fig. 8;.

.' Fig. 8 is a vertical section taken at right y angles to thesection shown vin Fig. 7 and Figs. 9 and l'illustrate two ways of forming the ends of the joist members shown in Figs. 7 and 8, the web member of the joists being bent at a different angle;

Fig. 11 is an end elevation of one of the and rst toFigs. 1 to 6a, the numeral 1in.v 100 A'handling w Yalignment, with the-karig thekwfasatii. InFig..6aw

dicates a steel base late which may be of any size convenient ier manufacturmg and into place having' aligned penforations formed therein as at 2 which are preferably rectangular in outline. A plurality of web plates or joists 3 are mounted on the base' late 1 havin tenons 4 alon their bottom e ges in space relation to eac other which are adapted to. extend into the erforati'onsv 2 and weldedA to the base ate 1 as at 5. The lowerportions of the )oists between the tenons 4 are cut out as at 6 ,to form arch sha of the joists to'lig ten the construction and also permit the distribution of concrete 7 between the webs of the joists while pourand assist in loc the concrete in place after it has set. ese joists 3 'havmg their tenons interlocked and welded to` the base plate 1 reinforce the slab and carry the major portion of the shear between -thev stringers. It be noted that these joists extend the full' depth of the slab, thereby contributing the maximum shear values of the web members and also take the direct impact from the trailic.

Kerfs 8 are formed at in theuppcr edges of the we of the joists. The ker s 8 in one joist. be' i in transverse ormed vin the adjoining joists and are adapted to receive tie-bars 9 having notches 10 formed therein to interlock with the same and welded thereto at their intersections as at 11. These tie? bars 9 serve the triple purpose of holding the upper edges of they oists against buckling, act as reinforcing Jbars for transverse distribution and as wearing bars for trailic. The concrete iill carries its art of the shear, 4.0' compressive stresses and her acts as a bond to hold the structural parts in alignment. l

In Fig. 6 I have shown two ways of weld- Y ing the tie-bars 9 to the joists in which one 4,5 of the kerfs is formed with an inclined side face 12 which is filled with additional ma` terial as at 13 by means of arc-welding which is the preferred manner of securing the tie-bars 9 to the joists, and this same 50,; manner may also be used in welding the tenons 4' to the base plate 1. In the other form of welding the tie-barsrto the joists,

the kerfs in the ]oist are formed with dove- A tailed lower portions and the tie-bars are H inserted therem in a loose manner andpressure. welded to the dove-tailed portion of have illustrated'another v manner of welding the parts together in l0 which the welds 11 between the tiebars 9 andthejoists' areformed atene of the.

. oorner intersections between 'the two memy bers, and the welds 5, forsecuring the tenons f 4ft0 the base plate 1 are dis rat-one #lof the lower slde edges of said tenons.

d holes in the bottomaced intervals- Lacasse As the width of the floor'or the like struc' Ature may be of considerable area it will in some cases be necessary to splice the mem- A bers'0f wlich the reinforcing structure is formedL which may be accomplished in any Aapproved manner, one way being indicated in Figs. 3 and i ofthe drawings in which a Apair of plates are used for connecting together the abutting ends of each member.

' As indicated in these two figures, the abutting ends of the tie-bars 9 are'spliced togetherb means of a pair of plates 15 which are wel ed thereto as at 16, the webs-of the joist being'connected together by a pair of plates 17 and welded as at 18 While the base plates 1 are similarly connected togetherby l means of a pair of plates 19 and welded theretoalong'their edges as at 20.l

In some cases however itis desirable to useI a single splice plate for securing the different members o 6a of the drawings. A

Floor sills 21 preferably lof I-beam con-'- struction support the floor, the base plate being welded to the top flanges of the sills the reinforcing structure together as indicated in Figs. l, 2 and The roador slab may in some cases be covered with a layer of sheet halt, blocks or other wearing surface as in icated at 23 in Fi 1.

Referring now to the .modification shown in Figs. 7 to 11 inclusive, in which a somewhat lighter metal reinforcing structure is illust-rated than that shown in Figs. 1- to 6 inclusive. Y

In this construction a base plate 24 used which is mounted on the floor sills 25 and welded thereto in a similar manner to the construction described for Figs. 1 to 6. On the base plate 24 is mounted a plurality of joists 26 arra d vertically in parallel relation to each oter or otherwise. These joists each comprise a top chord member formed of a pair of bars or rods 27 to which is attached a web member 28 which may be p continuous throughout lthe length of the top chord member. or partially continuous, Ior discontinuous; in the illustration however the `web member is formed -of a continuous bar or rod bent in a zigzag mannery one set of the bends or apices beingv welded or otherwise secured to ltop chord member as at 29' in 'such a mannerl to prevent slippage and to 'insure that shearing stresses carried by theweb member 28 may be .transformed into increments of longitudinal stresses in the top chord: member.

The joists,26A are arrangedin a vertical .i as

to ensure that shearing strees plurality of the 'bends or apices attached to i the top chord 27 and secured to .the top chord and' apices of the web member; the outer ends of the stay-bars or rods being bent down and secured to the top of the base plate 24. As indicated in Figs. 7 8 and 9 the stay-bars or rod lare welded to the Atop chord and web member in every other bend of that portion of the web member attached to the top chord but a greater or less number maybe used if desired.

With this construction the reinforcing members maybe assembled in the field or the completed reinforcin elements may be assembled in sections an can be taken and installed upon the supporting structure or 'A sills etc. in the shop and the joints between the' adjacent sections secured together by means of splice bars or splice plates uniting them, thus providing such continuity across the joints as may be desired andadd greatly to the general stiffness thereof by means of positive attachments, and will largely or wholly preclude the necessity'of lateral bracing or other customary means of resisting wind, traction and vibrational-forces.

After the reinforcing elements thus positioned have been attached together, thestructure is filled to, or over the tops of the joists and tie-bars with cement concrete, orA

asphaltic concrete, or other suitable material 32.

It will be noted that with our construction wooden or other forms will not be required to contain the concrete or other filler, as the base plate 2,4 entirely replaces thewooden forms which are required for most types of concrete floors.

Assuming that the filling material be cement concrete, this material will bond with 'ai .ma by the `emplea 24 ndiviehl vertical shear values provided bythe concrete filling 3 2 and by thepweb members -28 of the joists 26.`

After the concrete filling 32 or other suitable material has been poured upon the base plate 24 around and over the to ofthe L' ts 26 and stay-bars 31, it may if desired blogaks or other wearing surface as indica at v In Fig. 12 we have illustrated in cross section a modified Aform of joist in which the top and bottom chord members are used formed of angles 34, in Fig. 13 another form of joist is shown in which the .top and bottom chord members areformed of a air ofrods 35, and in Fig. 14 the top and ttom chord members are eac'h shown formed ofl a channel member 36 disposed with their ialpges extending inwardly towards each oterJH' Although we have shown and described our invention in considerable'd'etaih'we do not wish to be limited to Ithe exact and speciic details shown and described, but may use such substitutions, modifications or the scope of our invention or as pointed out in the claims.

covered w'th a la er of sheet as halt 1 y P tai 7 equivalents thereof, as areembraced within l v Having thusl described our invention l we claim as new and desire to secure Letters Patent is:

1. A metal structuie adapted toserve as .a reenforcement in concrete floor slabs or the base plate 24 and with the jois'ts 26 and Y will be locked ainst the base plates 24 by the cage formb bars 31. Therefore, under the action of the dead weight of the construction, and

also under the external or live loads4 as may be applied, the entire construction will o erate as a doublyfreinforced concrete s ab,

with tensile values in all horizontal direc-A tions, provided near the top by the top chord members 27 and'stay bars 31 and at tliebottom by the basey plate 24, with compressive values in all horizontal directions by the joists 2 6 andstay the like, comprising spaced joists, tie-bars' rigidly connecting one of the edges of the joists together at spaced intervals and means secured to and extending over t e oposite y the edges of the joists to those engaged tie-barsl and adapted to continuouslyconnect the joists together.

2.A metal structure adapted to be em- .l

bedded in concrete ror the hke,l comprising spaced joists, tie-bars rigidly connectmg one of the side ed es of the joists together,`and means secure to and extending over Athe other side edges of thejoists adapted to continuously connect the 'oists together.

3. A metal structure a apted to'serve as a reenforcement for concrete floors or the like, comprising spaced joists, tie-bars secured to the tops of the joistsextending transversely thereof and connecting the joists together, and a plate secured tothe bottomV of the joists for continuously connecting' the joists together. 1 1

4. A metal structure adapted to serve as a reenforcement for concrete door slabs or the like, comprising spaced joists each having a serrated bottom surface, tie-bars secured to the tops of the joists and extending transversely thereof, means for holding the topsof the joists in spaced alignment, and

55 provided throughout by the concrete filling a plate secured to the apis of the serrated 130 v351s s formed in one of the vla' the kerfs, tenons exten i jew fue iosa .capta a con; tinuously the'ioists together.v

` vIi. A reenforced concrete structure, comh spaced 'oists each ha a serrated 3 sui-fwd, tiq-bars exvt-iiin trailsversely of the jeists and secured late secured tothe apice's of the serrated `of the joists ada ted to continuously connectthe jotsfts to t er, anda filling of il? concrete or the-like tween the joists and continpouslyconnscted together through the op'eningsoforined by the serrations at the bottomofthejoistda 64A metal structure' ada ted to form a i@ reenfoncement for .concrete oors or the like, comprisin spaced joints, tie-bars interlockt espaced joists and secured there- 1 serratiohs formed on oiie ed e of the i spaced4 joists,ten'ons extending the lpices ot .the-serrated a plate provided with perforations pted to receive the tenons, means forseering the plate to- Y the tenons -to form' a continuous connection between the spaced joists. -7.'AmetaIstructureadatedtobeem bedded in concrete or the ke2 comprising spaced joists, tie-bars interlocking with the sfspaced )ciste and secured thereto, serrations l ormed on one-side of the spaced joists, and acontinuous plateconnection secured to the apices of the serrations formed in the joists. 8. `A metal structure adapted to form -a reenforcement for concrete oors or the like, com rising spaced joists, provided with' of the josts, tie-bars rovided with note es adapt` ed to interloc the joists,1means for secur the tie-bars to the joists, serrations form in the edges `4 ofthe joists'fop 'te the kerf tenons ex- ,from apices of e serrated of the joists, a plate provided-with adaptedto receive the tenons, vandY means for'securingthe plate to the "a ,tenons -to form a continuous connection be- ,tweenthespacedjoists.

.-9.- A metal structure lada to form a .nenfo rcement for concrete oors or the like comprising spaced joists arranged in parallel Ii alignment with each other, provided with herfs ea'ch having one of their side walls in-v and formed-in relation to each other infthatop edges of the ioists,tiebars provided with spaced notches adapted to ini terlockwithin-the kerfs in the joists, a

welded connection between the inclined side walls of the kerfs and the tiebars, arched shaped serrations formed at the bottom edges of the joists in staggered relation to from the apices of the serrated of e jioists, a plate provided with pe orations adapted to receive the tenons, and means for securing the plate to the tenons to form a continuous e5' connection betweenthe spaced 'joints ereto, a

onection between the inclined side walls of Aextending from the spices of the serrated with the kerfed in tenaces'.

v 10. metal structure,iadapted to 'form a' reenforcement for concrete floors or the like,

com rising spaced joists arranged in parallel a -gnment provided with kerfs each having one of their side walls inclined formed in spaced relation'to each other in the top edges of the joists, tie-bars provided with s aced notches adapted to interlock within t e kerfs formed in the joints, a welded conthe kerfs and the tie-bars, arched shaped serrations formed in the bottom ed of the joists in staglgered relation with t e kerfs, tenons each aving shoulders at their'sides edges of the joists,I a plate provided with perforations adapted to receive the tenons, a

welded connection between the plate and the tenons adapted to from a continuous connection between the spaced joists, supporting sills for the structure, means for splicing .the joists, tie-bars and plate, and means for securing the late to the supporting sills.

11. A meta structure adapted to form a reenforcement for concrete floors or the like, comprising spaced joids formed of lflat plates arranged vertically in parallel relation to each other, each provided with kerfs formed in their top edges in aced relation to each other, tie-bars intel-loc 'ng with the spaced joists and. secured thereto seri-ations formed in the bottom of the spaced joints, and a plate adapted to form a continuous connection between the joists secured to the serrated portion of the Joists,

2. A metal structure adapted to formy a reenforcement for concrete oors or the like,

comprising spaced joistsformed of flat plates, meansforrigidlyl the 10135!v Off l the joists her at spaced intervals, `an'd means exten over the edges of the joists for continuously connecting the bottom ofthe joists together'.- A 14. A metal structure adapted to form a reenforcement for concrete floors or thezlike, comprising spaced joists formed of" dat plates arrangedvertically in parallel relation to each other provided with kerfs each havin an inclined side face formed in the tops o the joists ins aced 'relation to each other, serrations in t e bottom of the -lao spaced joists, tenons extending from the apices-'of the serrations, a vplate provided wlth perforations for receiving the tenons, means for securing the tenons to the plate,

said plate adapted to form a continuous connection between the joists, tie-bars pro- Avided with notches adapted to `interlock within the kerfs, and means for securing'the ties-bars to the joists.

15. A' metal structure adapted to form a reenforcement for concrete floors or the like,

comprising spaced joists formed of lat\ plates arranged vertically in parallelrelation to each other provided with kerfs each having an inclined side face formed in the topsoi` the'joists' in spaced relation to each other, serrations lformed in the bottom of the spaced joists -instaggered relation tothe kerfs, tenons .extending from the apices of the serrat1ons,a-plate provided with perfoe rations for receiving the tenons, means for securing the tenonsto theplate, said plate adapted to form acontinuou'sconnection between the vjoists, tie-bars provided with notches `adapted to interlock within the kerfs, and means for securing the'tie-bars to'.

the Oists.

like, comprising spaced 'oists formed of flat plates arranged vertica ly in parallelrelation -to each other, spaced-tiefbars rigidly connecting one of the edges -o the joists together at spaced intervals, a plate extending over the edges (of .the joists and secured thereto for continuously connecting the oposite edges of the joists to those connected y the tlc-bars, and a concrete filling or the like between -the joists.

17. A reenforced concrete Hoor-slab or the like, comprising spaced joists arranged vertically in arallel relation to each other each formed with a web having serrated bottom s edges, tie-bars welded to the 'oists for connecting the top edgcsof the ]oists together at spaced intervals, a plate secured to the serrated bottom edges of the joists and adapted to form a continuous connection between the joists, a concrete filling 'orthe like between the joists 'and continuously connected together inthe spaces formed bythe serrations, and a Vwearing surface extending over the structure.

. 18. A metal. structure adapted to form a `reenforcement for concrete oors orthe like, Ycomprising spaced joists arranged in parallel relation to each other formed with top l.

chordl and web members, tie-bars extending transversely of the joists and rigidly secured p thereto,` and a plate welded tothe bottom edges of the joists adapted to continuously connect the 'said joists together.

19. A metalstructure, com rising spaced ,y

joists arranged in parallel re ation to each other, a. zigaa web member for each joist, a top-chord fbr each joist attached to' the 1el` relation toeach other each forme rigidly secured to the aplces at t e top Vof the web member and to the top chord, and a plate extending over land secured to the apices at the bottom of the web member adapted toform a continuous connection between the joists. f l

20. A metal structure adapted to forma reenforcementfor concrete floors orthe like, comprising spaced joistsarranged verticallyin parallel Irelation to each other, a continuous zigzag' web for each joist, a top chord for each joist attached to the apices at the top of the web, -a plate extending over'- and secured to the apices at the bottom of the web adapted to form a continuous connection between 'the joists, and tie-bars having their ends attached to the plate and ex-` tending transversely of the jofists and rigidl secured to the-apices at the top of the we and to the top chord for connecting the spacedjoists together.

21. A metal structure adapted=to form a reenforcement for concreteiioors or the like, comprising spaced joists arranged in aralwith a web and top and bottom chord, tie-bars extending transversely of the joists and rlgidly secured thereto, and a plate adapted to` extend over the edges of the joists and welded thereto adapted to continuously connect the joists together. v

reenforcement for concrete ioors or. the like, comprising spaced joists larranged 1n parallel relation to eachother formed with a web and top and bottom chord members of ilanged sections, a plate extending overone of the edges of `each of the ]o1sts and adapted to form a continuous connection between the joists, and tie-bars extendin 22. A metal structut'e adapted -to form a transversely of the joists and rigidly secure 'l thereto with their ends securedto thev plate. 23. A metal structure adapted to form a reinforcement for concrete floors or vthe like,

Comprising Spacedjoists, means rigidly ty ing the tops of the joists togetheratspaced intervals, and means connecting the lower mi l portions of the joists to constitutea bottom `for such structure rigidly united to the joists and' ada ted to sustain the concrete in its' ""las

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