US 2457086 A
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Description (OCR text may contain errors)
Dec. 21, 1948. P. MITCHELL ET AL 2,457,086
`FLOOR Filed July 31, 1944 2 Sheets-Sheet 2 i \\\""Illl/ ltorney Patented Dec. 21, 1948 Fllen-Mitchell; Linthorpe, and Uttley Ransonv lvfit'chelll.Guiselew..Englandlv Applicationluly 3l, 1944', SerlNb.' 547,347" In. Great Britain .Iuly 15,1943
3 Claims. 1
' Thisinventionl relates to "the construction of floors of" buildings (including roofs) and` is directed' towards the production of any improved floor construction employing sheet material pressed? into" appropriate shape;
'lh'e 'invention isparticularlyr suitable for" use with: pressed steelfmembers, but may also be applied'to othersheet' materials such as plastics; AdvantagesA of the' invention include lightness of constructionr providing' economy in the" actual unit-'andE stillurtl'ier economy inthe supporting structure, due. ,to the` decrease in dead weight of the floor or roof'. Further' vadvantages are that' all the" can' be erected` and attached to the supporting` structure from.. the top, therefore no staging is required to put the units into placegorftovsecureiy thezuntsgfone totheother, to complete the floor or roof. Another advantagerelates to theattachmennot thelioornboards or other surface mat'erial"direct t'o the top of the steelf unit, without the need'for any formfof nailing strips or other: attachingY media.
The primary object-ofl theinvention is.to providev ai door beamv -formed off sheet material* and having a: primary web4 member' at one' side of the topange and a secondary" web member at the otherc side thereof.
Another object` is. to. provideiai f1oorfbea1mf of sheet .material-andfhaving. a-primary web member at one side of the top flange and a secondary web member at the other side thereof, said primary and secondary web members being so joggled that the joggle of the primary web of one beam fits into the joggle of the secondary-web of the adjoining beam.
Several beam units of the present invention may be connected together in the fabricating shops in such a manner to provide air-conditioning ducts as part of the floor construction.
With these and other objects in view the invention consists in the improved constructions now to be described in relation to the accompanying drawings, the novel combinations being set out in the claims which follow.
In these drawings:
Fig. 1 shows in elevation one form of floor unit according to the invention, with a portion of the adjacent unit on the left thereof,
Fig. 2 shows an end elevation of part of the unit shown in Fig. 1,
Fig. 3 shows a section through a floor according to; -tliieinvention with the units resting on the topfl'a-nge of! al maint' girder,
Fig-i Lifi's'- a similar View for the case in'whiich the bottom of the units come be'low'theftop flange of a main girder,
' Fig; @illustrates-f thev suspension of ceilingsheet bearers fomthe lower' a'nges;
Fig; 6 illustrates a".lmodification for large' spans in. whichf thewebsof* the units are of openwork construction;v
Reiierringrst t'onFi'gsylHand 2; the floor unit" has a. top lflange I,l a; primary web,y 2, a 'bottonr flanged; and secondaryweb 4 for engagement withithe web. 2i ofi the* adjacent unit. The bottom langet' may' be on the opposite side of the pri-- mary `web 2f to= that illustrated. Interengaging jbggles. 93 lill-are' formed in. the Webs 2, 4.
'theme-be2: has; atfappropriate intervals stiifen-v ing;F depressionslwformed therein and the webs havevinterengaging loopsl 6", 6u formed therein. Gottersi 'i 'engage ini' these.A loops and. clamp the secondary websr 4 to thev primary webs 2 of'. adjacent units, holes 8 being provided in the flanges t: for: insertion. off, the". cotters'- 1;
Alternative iixiirgto. the'y cotter and loop i's a nollowfeyelet'noni the/Web 2 engaging a hole ini the"A vweb lli and". being bent over by an expanding tool orspot Welds between buttons formed on the webs 4 at intervals.
The engaging tops of the web leave a slightly tapering space I I into which may enter nails for fixing boarding.
The bottom flange 3 has an upturned end I2 and has a strengthening flat I3 welded thereto to increase the section modulus when required.
Referring next to Fig. 3, adjacent units rest with their bottom flanges 3 upon a main girder l5 with a space I4 between them, a jointing member I6 holds the adjacent units together.
In the example shown in Fig. 4 the bottom Iianges 3 are cut away and the webs 2 rest on the beam.
Hook bolts may be used to secure the bottom nanges of the door beams to the main girders I5.
Asbestos cement or similar corner pieces l1, I8 with bearing portions I9 and stiifenng membrane 2li at intervals bear against the upper surfaces of the lower girder flanges to mask the girder and give re protection.
Ceiling corners 2| rest against these corner pieces and are supported at the tops by ceiling bearers 22, also of asbestos cement or similar material.
These bearers 22 have hooked ends 23, Fig. 5, which hang over the upstanding portions l2 of the bottom flanges -of the units.
Fig. 3 shows a floor having tongue-and-groove boards 24 secured by nails 25 which enter the space Il, Fig. 1.
In Fig. 4 a composition floor 26 is shown as laid over the oor members.
Referring now to Fig.' 6, which is suitable for iioors having large spans between main supports,
the primary web members 2 of the previous iigures are not continuous sheets as in the previous examples but have portions 21, 28 connected by diagonal members 29, welded thereto, forming an open framework construction. v
At the supports connecting to the girder l 5 are welded plates 30 and shelf angles 3l support the lower anges 3 of the floor beams.
In the drawings the tension ange members 3 are shown as on the opposite side to the upper iiange members l, but u,they may if desired, be placed on the same side.
The invention is not restricted to the details above described but includes all constructions and modifications coming within the ambit of the claims which follow.
1. A floor beam formed of unitary sheet material having a top ange, a bottom flange, a primary web connecting the top ilange at one end to the bottom ange, a secondary web at the other end of said top flange, said primary web and said secondary web being joggled with a lower portion oifset in relation to the upper portion, the joggle of said primary web adapted to intert with the joggle of the secondary web of an adjoining beam of the same shape, loops provided in the primary and secondary webs below the joggles with their axes vertical, the loop on the primary web adapted to intert the loop on the secondary web of an adjoining beam of the same shape, and the top flange having an opening above one of the loops whereby a cotter can be inserted vertically from above to engage a loop to secure adjoining webs together. f
2. A oor beam formed of unitary sheet material having a top iiange, a bottom ange, a primary web connecting the top flange at one end to the bottom flange, a secondary web at the other end of said top ange, said primary web and said 4 secondary web being joggled with a lower portion olfset in relation to the upper portion, the joggle of said primary web adapted to intert With the joggle of the secondary web of an adjoining beam of the same shape, with the lower portions of said adjoining secondary web in contact with said primary web, and the upper portion of said secondary web spaced from said primary web to permit the application of nails for securing the floor boards to the oor beams, loops provided in the primary and secondary webs below the joggles with their axes vertical, the loop on the primary webv adapted to interfit the loop on the secondary web of an adjoining beam of the same shape, and a top ange having an opening above one of the loops whereby a cotter can be inserted vertically from above to engage the loop to maintain the Webs in nail receiving cooperation.
3. A floor beam formed of unitary sheet material having a top flange, a bottom flange, a primary web connecting the top ange at one end to the bottom flange, 'a secondary web at the other end of said top ange, said primary web and said secondary web being joggled with a lower portion oiset in relation to the upper portion, the joggle of said primary web adapted Vtointeri'lt with the joggle of the secondary web of an adjoining beam of the same shape, loops provided in the primary and secondary webs below the joggles with their axes vertical, the loop on the primary web adapted to intert the loop on the secondary web of an adjoining beam of the same shape, and the top ange having an opening above one of the loops whereby a cotter can be inserted vertically from above to engage a loop to secure adjoining webs together, said primary web having a stiiening depression -below said loops.
PULLAN MITCHELL. UTTLEY RANSON MITCHELL.
REFERENCES CITED UNITED STATES PAI'ENTS Number Name Date f 1,986,998 Burgess et al Jan. 8, 1935 2,028,554 Main Jan. 21, 1936 2,042,797 Mechin June 2, 1936 2,084,853 Marks June 22, 1937 2,131,268` Boes Sept.` 27, 1938 2,145,012 Nirdlinger Jan 24, 1939 2,181,831 McLaughlin, Jr Nov. 28, 1939 2,121,269
Sisson June 21, 1938