US1474659A - Concrete form and support - Google Patents

Description

. Nov. :20,1923- 1,474,659

n VV. EL VVfiVTEI CONCRETE FORM AND SUPPORT Filed Dec. 2, 1921 Patented Nov. 2, 1923.

WILLIM'T E. WHITE, or cnrcaeo, ILLmoTs.

coucmrrn reim AND surronr. l

Application mea December a, 1921. smal rutinas.l

To all 'whom z't may concern.'

Be.. it known that I, WILLIAM E. IVHrrn, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Concrete Forms and Supports, of which ythe following is a specification.

- My invention relates to improvements in forms and supports -for the production of concrete floors and has special reference to supportsV for what are known as form pans used in such work. A similar construction is shown in my co-pending application Ser. No. 519,374, filed Dec. 2, 1921, in which a plication this claimed. l

The object of my invention is to provide supports of such character and assembly that they and the pans can readily be assembled into position from the top ofthe 'false work with which they are used; and which shall be capable of being readily and easily taken down from beneath'the finished concrete floor by the removal of parts or devices which are readily 'destructible It is a further object of myinvention to provide the supports with what might be aptlyv termed ey members which are insignificant as to cost, which can be readily and easily cut or'destroyed and when once destroyed the parts of which are readily removable and thus permitting the ready removal of other and more stable part and4 devices.

It is a further object of my invention to provide the destructible parts of such character that it shall be cheaperv to destroy them, using new parts on each job, than it would be to'attempt to preserve them for future use.

It is -a further object of my invention to provide supports for the purpose named which will materially reduce the labor cost of assembling forms lin position for a concrete floor; which can readily be assembled from the top of the false work and which can be easily removed when the .floor is finished.

My invention resides in supports for concrete forms which supports include an essential element capable of ready destrucconstruction `is broa yl tion andlwhich when destroyed unlocks the A,

other parts or-members and permits their ready removal.

My invention will be more readily under?,

stood by `reference to the accompanying drawings forming part of this specification, and in which: c Fligure 1 is a vertical sectional view of a concrete door 'shown'in process of construction with the false work supports and forms 1n place;

lfigure 2 is. an enlarged sectional view-of one of the temporary joists and supports;

Figure 3- is a fragmentary side e ovation of one of thestrap hangers forming part of my support; 1

F1 re 4 is a vvperspective view of a wire brac et forming the destructible element of m support;

, igure 5l is a fragmentary perspective view of one end of one of the support bars;

Fi re 6 is a .perspective view of a modified orm of stra y hanger; and

Figure is aagmentary view showing a slightly modified form of the lower edge of the pan. l v c In said drawings 1 represents the concrete floor to be produced consisting of 'a horizontal topslab 2 and parallel depending integral r1 or beams 3. The beams are spaced a art; horizontally of the-floor portion 2. or building such a floor joists 4 are provided which are sup orted in position on edge on suitable alse work not shown. One of the j'oists 4 is arranged centrally beneath each ofthe beams 3 to be produced. For producing the beam-like members 3 I use orms 5 which I make of sheet metal and each of which consists of a top portion 6 and depending side portions 7. These forms are arranged between adjacent joists and project upwardly above the 11p er edges of the joists to produce the spaces between the depending beams 3.

While some features of my invention relateto the specific shape of the pans 5 my invention has to do more particularly with means for removabl supporting the pans 5 in position at suitab e hel hts to produce the depth of beams desired. or the purpose of supporting the pans 5 in position, I provide strap hangers 8` of U-shape and adapted 'to be hung upon the joists 4. These hangers the upper edge of the j oist to hold the hanger in osition. I'provide each-leg I10 with a lur securing to the outer `face of the leg, a suitable hooked member 14 either byrivets 15 or by spot welding to the hanger. Each hook 13 comprises a base portion 16 adapted to contact with the outer face of the leg 1.0 and i formed to provide two openings 17 extending downwardl from the upper edge of the plate, separate by the hook 13 which 1s onset outwardly from the base 16. I provide a plurality of these hooks 13 on each leg of each hanger 8, spaced vertically at regular intervals, the function of these hooks being to receive and hold brackets 18 preferably made of wire. Each bracket 18 is made in the form of an elongated loop as best shown in Figure 4 comprising an upper end or bar 19, parallel side parts 20, and a lower end or bar. 21. The sides 20 are spaced apart so that the upper end 19 can readily be placed under one of the hooks 13, the side bars 20 of the bracket vprojecting through the slots 17 at the sides of the hook 13. The sides 20' are bent between their ends to provide a horizontal portion 22 and a dov` nwardly and inwardly inclined portion 23. The bracket is of a suitable length so that when the upper end 19 is engaged with one of the hooks 13, the lower end 21 can be engaged with the next lower hook 13 as best shown in Figure 2. The ends 24 of the wire of which the bracket 18 is formed, are brought together at the middle of the lower end 21 andas the lower end enters into the space in the base 16 this lower end is prevented from spreading by the side parts of the member 14.

For supporting the pan 5, I arrange the I brackets 18 on the hangers 8 at the height desired, as best shown in Figure 1, the hangers on adjacent joistsbeing arranged in transverse alinement. -Upon the opposed brackets 18 I arrange a transverse support bar 25, this support-preferably being in the form of a channel member having a top web part26 and depending side flanges 27. The channel is of a suitable width so that the brackets 18 can be received between the flanges 27 and the web portion 26 rests upon the upper horizontal parts 22 of the brackets. The length ofthe support member 25- ity of hooks 13 preferably formed by is slightly less than the normal spacing of the opposite hook parts 13 to allow for sli ht Variations in the spacing of the joists. pon the upper face or back of each channel support.` member 25 I secure or form two stop shoulders or knees 28 spaced apart so as to tit in between the lower edges 29 of the pans 5, as best shown in Figure 2.

UsuallyI the lower ed es 30 of the beams 3 are wider than the thickness of the joists 4 and I hold the lower edges 29 roperly spaced and in contact with the stop s oulders 28 on the support bars 25 by means of horiz'ontal wooden members 31 which are adapted to be forced downwardly between the sides of the adjacent pans and are adapted to rest upon the tops of the hangersl 8 on the joists 4.'

Preferably I bend the extreme lower edges 32 of the sides of the pans outwardly and upwardly to form more or less rounded edges on the pans and to provide drain grooves for catching and retaining any cement water which may leak 4through between the sides of the pan and the edges of the strips 31. In assembling the pans and supports, the joists 4 are arranged in suitable spaced relation, the hangersl being secured thereon before the joists are raised to position or theyl can be placed and secured on the joists after they are in position. The joists and hangers being in position, the wire brackets are then arranged at the proper heights on the hooks 13 and then the transverse support bars 25 are placed on the hooks,'-thereafter-the pans or forms 5 are placed in position, the rounded lower corners 34 on the pans and the rounded upper parts 35 on the shoulders 28 assisting .in the proper positioning oi the pans in an obvious manner. Thereafter the strips 31 are forced down between the adjacent pans, the arrangement preferably being that the strips fit tightly between the sides of the pans and force the lower edges v ofy the pans `against the shoulders 28 on the support bars-25.

It will be understood that all this work of arranging the several parts in position is accomplished from the top or upper surface of the false work comprising the joists 4 and their supports and that there is no necessity of any work being done -from beneath. After the pans have been wedged into position on the supports as described, the concrete is filled lin to forni the beams 3 and the floor 2 and the whole remains in such position until the concrete has set. In constructing the floor as described, the next step 'is to re- -move the forms, the false work remaining in position until the floor has hardened suiiciently to properly support itself.' To accomplish this, it is merely necessary to cut the lower members 23 of the wire brackets 2O at the points 36 as high as possible on the inclined lower portion 23. `As these brackets v are-made of wire which issub-stantiallyl an eighth ofy an inch in\diameter they can bev readily cut by means of suitable wire cutters and -.then the lower ends canl be readily be removed to permit the upper parts to drop down, as shown in dotted mes in Fi re 2. Thereafter, the u per portions of the rackets can readily lifted Q ofthe .upper hooks 13 especially as I ypreferably cut awfy the web 26 of the supportbar'25at its en s forming openings 37 etween the side lian es at each end of this member through which these upperportions of the brackets can ets are removed the sup ort bars V can be eadily dropped down. avlng removed the supports 25', the pans 5 are removed in the ordinary manner by freeing. them from the concrete, they' having preferablyv been"r first oiled on their outer surfaces before the con.- crete was poured. But in any eventl they are not ordinarily free enough of the concrete to'inadve'rtently drop down upon the workmen but must be forcibly removed from their ositions. Having removed the pans 5, the

' also work consistmg of the joists 4 and their supports and the strips 31 are moved in the usual manner.

It is obvious that by placing the bracket 18 at different heights on the'hangers 8 I` vcan raise or lower the pans 5 to make the I. beams of different depths depending on what is desired.

In Figure 1 I have shown the beams'as "being'of maximum depth and it is obvious Athat if .the brackets 18 were placed lower on -the hangers thebeams 3 would be of less height. PreferablyI make thelower portions 38 of the sides 7 of the pans 5 parallel with each other so that the strlps 31 properly fit between the sides of adjacent pans regardless of the height of the pan, that is,

' vwithin the limits of the support devices.

5las

The upper portions 39 of the sides of the pans are inclined inwardly thus producing the wedge Aform of beam desired' and also permitting the easy forcing of the strips 31 down between the sides of adjacent pans. The strips 31 are referably made of such width that they w' l, when laced into position, force `the sides of t e against the shoulders 28.

Instead of forming the hooks 13 as' described, that'is attaching hooked plates to the legs 10 of the hangers 8, I may form the hooks as integral parts of the hangers, strikin up theh'ooks as shown at 40 out of the si e legs 10 and providing at the sides ofthe hooks spaces or slots 41 so thatl the wire brackets can be placed in position as described hereinbefore. While this form of hanger is somewhat cheaper than the form before describfed, I refer the form in which the hooks are ma e by attaching hooked plates to the bracket, for the reason that pans' tightly will readily .form pans for producin the lower ends 21v of the wire brackets invention e production-of a concrete floor and the like x havin parallel concrete beams on its under be side, orm pans for producing said beams, l raised and removed. When the wire brack` means for supporting the (pansin position comprising hangers adapte to be supported on temporary joistsarranged beneath saidbeams, spacer bars adapted to span from joist to joist, and destructible metallic bar-v support velements adapted to be supported on the hangers, the s acer bars arranged A'to support 1 the pans, t e` destruction of the metallic support elements permitting the free removal of said bars crete beams on its under side, open bottomed the beams, hangers adapted to be supporte on false work joists beneath said beams, hooked projections on the sides of the hangers, wire support mem bers for engagement with thel hooks,'bars adapted to span fromy beam to beam and to be supported at their ends on said wire members and said pans adapted to be sup orted on saidv` bars, the destruction of sai --wire members ermitting the free remov-al of the bars and t e pans.

3. In concrete form supports of the kind described, temporary destructible support brackets, a channel shaped support -bar adapted to rest at its ends on opposed brackets, the webof the bar cut away at its ends to facilitate the removal of the bar after the destruction of the brackets, as and for the purpose specified.

In a concrete form support for open bottomed form pans, transverse bars for supand -the pans, as v vand for the purposespecifed.

2. In a system of forms for the production of'a concrete floor having parallel con for producing the beams, metallic .hooked hangers adapted to rest upon temporary joists arranged beneath the beams, easily removable metallic support elements engaging said hangers, transversely extending support bars resting at their ends on said removable supports, shoulders on said bars for holdin the lower edges of the pan properly space and strips for placement o the tops of the joists and between the sides of adjacent pans for fol-cin the sides of the pans tightly against said shoulders.

6. In sheet metal forms for concrete Work,

5 open bottomed U-sha-ped pans, removable means for supporting the pans in position, the side edges of the pans being turned outwardly and upwardly to form rounded stilened edges on the pans capable of catchino` and holding seepage. l

igned et Chlcago, llinois, this 28th day of November, 1921.

WlllLlIAli/l E. WHITE.

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