US 1576846 A
Description (OCR text may contain errors)
March 16 1926. 1,576,846 H. POMFRET coucamm BUILDERS AGGREGATE SUPPORT Filed August 11' 9 5 I rwembr Jfereri Pamfrefi Fatented Mar. 1%, i926.
HERBERT POMFRET, OF LOS ANGELES, CALIFORNIA.
CONCRETE-BUILDERS AGGREGATE sUrron'r.
Application filed. August 11, 1925. Serial No. 49,555.
5 California, have invented a. new and useful Concrete-Builders Aggregate Support, oi which the following is a specification.
In monolithic buildings the concrete floors are supported by beams and beam supported joists which extend from beam to beam at right angles thereto; all three elements constituting a monolithic part of the structure; and in order to temporarily support the aggregate for the floor, joists and beams, the builder employs temporary wooden beam forms, and metallic pans con sisting of U-shaped sheet metal trough-like bodies; and such bodies are made of different depths, and their walls are temporarily nailed to wooden joists that extend across the entire space between, and jam against the sides of the beam forms in order to confine and support the aggregate of which the floors, joists and beams are to be made.
The beams are molded in trough-like temporary structures comprising beam-sides and soifits extending-from column to column of the building and supported by trans verse caps a few inches longer than the width of the trough formed by the soflits and the beam-sides; said caps being supported by shores supported by releasing wedges which in turn are supported by planks laid on the ground or on a floor below the floor to be constructed.
Near the upper edges of the beam-sides, ribbons are nailed to support the temporary wooden joists, and on these ribbons the ends of joists are laid to support the pans, or the temporary decking, which is equivalent thereto. Such ribbons are usually .oneby six inch'boards. v
The concrete joists of different buildings are or" various depths according to the purpose of the engineer; and where the ribbon is-used, it is not possible, without, additions to the form or a loss of concrete, to use pans having a depth so great as to extend below the bottom of the temporary wooden joists that rest upon the ribbons.
When the pans are ofsuch depth that they must extend below the bottom of the,
joists that support them, the ribbons interfere with bringing the ends Of t e pan jam" against the beam-sides, and therefore open spaces are left between the wooden joists, the beam-sides and the ends of the.
pans, andsuch spaces must be filled in some manner as by strips of wood, to prevent the aggregate from falling through.
' An object of this invention is to make provision whereby the ribbon may be dispensed with, thus allowing the sheet metal pans to be extended below the wooden joists when necessary, and yet allowing their ends to normally fit jam against the beam-sides; thus allowing the use of deep pans for molding. concrete joists and slabs in cases where the pans are so deep relative to the: concrete joists, that their edges must extend below the bottom of the wooden joists to which they are nailed or otherwise secured.
An object is to eliminate the ribbon and the time, labor and material heretofore necessary in order to use such pans when they are so deep as to extend below the temporary joists.
An object ofthis invention is to provide brackets which will support the temporary joists without likelihood of crushing the beam-side and to combine therewith temporary wooden joists in such a. manner that the workman erecting the temporary form will be enabled, without measuring to invariably place the temporary joists in position properly centered on the bracket; In this respect the beam-sides are constructed with cleats of a width not to exceed the width of the joists; and the brackets are formed of bent metal plates of sufficient thickness to support, with a. high coefiicient of safety, the weight to which they are to be subjected, and such brackets are fastened to the beam-sides and are centered with respect to the cleats; and I have provided a central tooth on the bracket to enter saw kerfs in the ends of the joists when the joists are in place.
The invention lncludes the beam-sides provided with the narrow brackets thereon,
claimed, and the specificv construction of joist, supporting bracket which will hereinafter he described and claimed.
Superior strength of the temporary form, and ease of erecting and disassembling it are further objects of the invention.
the is j u, 4
lrert in the end of ajolst and y S0 1 2" Objects of this invention are to save labor and nails in building such false Work, and to preserve for subsequent use the lumber employed in such false Work; to save concrete; to facilitate proper pla cingotthepa'ns and to facilitate removal ofthe false. work after the concrete beams, ceiling and floor have set.
The beam-sides are usually constructed of such diti'ieulties.
This invention comprises a novel beamside "for use in inouldingthe sides of beams in concrete structures and such novel beamside is provided with brackets adapted to support the ends of the ten'iporaryjoists and not exceeding in width, the width of such joists, so as to allow the pans to be fixed to the sides oi the temporary joists andextend tlierebelow and yet be brought jam against the beam-side that supports the joists, for supportingthe pans or the deckino' for the. floor to be moulded. i
in this invent-ion I eliminate the ribbons and provide brackets extending over the cleatsv to supporttemporary joists, and I make these brackets of a width not exceeding the width of the ten'iporary joists.
A further object of the invention is to pro vide a simple and efiective bracket which can be placed at diiierent positions along the beanrside to accommodd e the 'diiierent spaces of the temporary joists. I i
A. further advantage secured by this invention isthe certain snpport'i or the beam- .sides which is seuured by the brackets. arranged to hold the beam-sides against the lateral n essure of the aggregate whilev the beams e being molded.
fin ipoitant adi antasegained y this .inrentie; arises from sti- King up from the joist siipporting ledge of sheet. in ta l bracket, a tooth extending transversely of so enter zit/longitudinal aw the tooth the same beco nesifa-fixedpartfot the-bracket and tlrejois is held. iiiplacefly :nply seating it oh the end. seating; the tooth in the joist; and; b rtlis"si-m iile means I securethe required stabi eeonomirie the ti ni'e oi the workman stripping the joists is sin'iplilied and there is no waste of material and a great. economy of s side and bracket. on a plane indicated by line in. Fig.. 1. v
Fig. 3 is a perspective view of another form of the bracket.
Fig. 1-; is an elevation: illustrating the use of the bracket in. building. a concrete structure, fragments of. which are shown in vertical section on di'l ierent planes! Fi 5 is a tragmental elevation in vertical section at right anglesto Fig. l on line :0,
further il ustrating the use of the-invention in concrete construction.
T hebi acket a consists of a plate-compris ing an intermediate upright member 1 proyided with an upperhook 2, a lower ledge 3 and a down-turnedtemporary work holder The hook-isshown as provided at 5 with a hole forming a retainer by which the bracket may be secured to thetemporary work as by means of a nail or the like, driven through the hook into the beam-side; and the ledge 3 is likewise shown with a re tainerior the same purpose and adapted to engage the temporary oist.
Saidretainers may be in. the form of perforations 5 and 6 and nails may be driven througlr-said perforations into-the tempo rary work to fix the brncketto such work.
In Fig. 1 the ledge is also shown with a retainer formed of a tooth 7, which is stamped up at an angle of from the ledge 23 indicated by the hole- 8 from which said tooth has been stamped in Fig. 1. V T he form of the blank plate from which thebraoket shown in- Fig I is bent up will be understood from Figs. 1, Qand 3, by
those skilled in the art.
. The struck up tooth 4' is preferably a rightan gle triangle as indicated in Figs. 1 and 8". and the perpendicular of such tooth fits snugly againstthe upr 6 faeeof the: intermediate memher :1- of the bracket, and a bracket thus termed 1sz1cl-apted tomazimmm strength with minimum structure.
A The sheet meta pans are usually made in: sections. the intermediate sections being ab *e'thebeam-sides and to gem e form to the secre e een; bet e n t e c n e j t I j H j I I, j tinuati'on thereof;toyretain. theago'r e no the wort since he 113 1101; requ red-to ban; die or dr ve any na ls 'and the work 9f The pans 9 to support the concrete are usually supported by temporary wooden worlsuch as the shores 10, cap 11, braces 12, beam sotlit 13, beam-sides l t with cleats l5 and temporary wooden joists 16; the shores being supported by releasing wedges Z) on the plank (7 laid on the foundation or floor (Z below; and the beam-sides and joists serv- .ing to su )Olt the pans 9.
The joists 16 are su iiported by the brackets a, in the following manner. The hooks 2 are seated on top of the beam-sides of the temporary work and the temporary joists 16 are seated on the edges 3. If nails are used to fix the hook and ledge in place, they are driven through the retaining holes and into the temporary work with the downward extensions of the ledge against the faces of the cleats as in Fig. 4, or against any other part serving a like purpose.
The bracket thus serves the double purpose of supporting the horizontal joist, and retaining the top of the beam-side against lateral pressure of the aggregate.
In case the tooth 7 has been struck up from the plate, transversely to the ledge, in forming the bracket, the ends of the joist will be provided with saw-kerfs 17, which will receive the teeth 7 in assembling the temporary wooden work.
\Vhen such work is thus supported the ans' O or the aggregate or equivalent decking 18 will be brought into place to support the concrete 19 in the usual way.
The downwardly extending temporary work holder or retaining means a support the tops of the cleats; and the lower ends of the cleats are supported against lateral pressure of the aggregate in the usual way by blocks LO nailed onto the caps.
After the concrete forming the beams 21 or the slabs 22 fully cured, the temporary work may be easily removed by taking down the beanrsides with the brackets.
1. A. concrete builders pan support, comprising a beam molding form having beamsides provided with upright cleats and with brackets adapted to support temporary joists; said brackets and cleats being of less width than the joists for the purpose of allowing the concrete builders pans, when fastened to the temporary joists, to extend below the temporary joists and to be brought jam against the beam-sides.
2. Ihe combination with a temporary concrete builders pan supporting joist, of a beam-side provided with an upright cleat to extend under an end of a temporary beam supporting joist, and a bracket on said =eleat of a width no greater than the joist supporting said bracket,'being adapted and arranged to support an end of the temporary joist for supporting the pans.
.3, A beamrside for concrete builder proledge for the purpose of supporting thev beam-side against outer pressure.
5. The bracketfor a beam-side having an upright cleat; said bracket being a metallic plate bent at its upper end to form a hook and at its lower end to form a ledge, said ledge also being provided with a tooth struck up from the ledge and extending transversely thereto for the purposeof engaging the end of a joist. a
6. The combination with a beam-side and a temporary joist having a central saw-kerf in the end; of a bracket provided with an intermediate member, a hook at the top of the member, a ledge at the bottom ofthe member and a tooth struck up centrally from said ledge to be seated in the saw-kerf when the joist is on the ledge.
7. The combination with a beam-side and a temporary joist having a saw-kerf in its end; of a bracket consisting of a plate not exceeding in width the thickness of the joist and consisting of an intermediate member, a hook at the top of said member, a ledge at-the bottom of said member and a tooth struck up from the ledge, and adapted to be seated in the saw-kerf when the joist is placed on the ledge.
8. The concrete builder's bracket set forth con'lprising a bent plate having an upright intermediate member, a hook at the top, and projecting from one face of the intermediate member, a ledge at the bottom and projecting from the other face of the intermediate member, and retaining means extending downward from the ledge.
9. The concrete builders bracket set forth comprising a bent plate having an upright intermediate member; a hook at the top of the intermediate member: a ledge at the bottom of the intermediate member; and retaining means extending downward from the ledge, said ledge and hook being pro vided with means for securing the same to temporary work 10. The concrete builders bracket set forth comprising a bent plate having an upright intermediate member; a hook at the top of the intermediate member; a ledge at the bottom of the intermediate member; and retaining means extending downward from the ledge; the ledge being provided with an upwardly extending tooth to engage temporary work,
11. A iziiacket having an upright intermediate member a hook at the top of the intem'nediaie member, a ledge at the bottom of the intein'iediete member, and a tooth struck up from the ledge and adapted to be inserted into the end of a joist supported by the ledge.
12. A bracket comprising a bent plate having an upright intermediate member, :1
hook at (he top of the intermediate memher, a ledge at the betem ofthe inter 'iediate member; and a triangular teeth struck up from the ]edge with its perpendicular against the u-prighe intermediate men'ibei',
In testimony whereef, I have hereunto set my hand at Les Angeies, California, this lth day of August, 1925.