US2833020A - Forms for making a concrete step support - Google Patents

Description

J. W. BARBOUR FORMS FOR MAKING A CONCRETE STEP SUPPORT I Filed Feb. 2'7, 1956 May 6, 1958 2 ShH ts-Sheet l INVENTOR. James W. Barbour.

ATTORNEYS.

May 6, 1958 J. w. BARBOUR 2,833,020

FORMS FOR MAKING A CONCRETE STEP SUPPORT 2 Sheets-Sheet 2 Filed Feb. 27, 1956 INVENTOR. James W Barboun A TTORNE V5.

United States FORMS FOR MAKING A CONCRETE STEP SUPPORT James W. Barbour, Independence, Mo.

Application February 27, 1956, Serial No. 567,940

2 Claims. (Cl. 25-118) This invention relates to step construction for buildings, and more particularly to such structures wherein concrete footings adjacent the walls of the well and build stair-supporting buttresses of concrete block to provide supports for precast concrete steps. This method has the advantage of having less weight in the steps but still requires expensive labor of a mason to build the concrete block buttresses.

The objects of the present invention are to provide step supports for precast concrete steps and stair wells defined by concrete walls wherein said supports are integral with the walls; to provide forms for the concrete walls and step supports whereby said supports are poured with the walls; to provide metal wall forms with laterally extending portions inclined relative to the edges and in alignment with similar portions of adjacent forms to form concrete receiving cavities with sloping surfaces 7 to facilitate removal of the forms from the poured concrete and to provide a step construction for stair wells that is economical in that it uses a minimum of material and labor and is easily installed in an attractive, etficient stairway.

In accomplishing these and other objects of the present invention, I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein: t

Fig. 1 is a side elevation of a portion of a group of forms of a stair well wall with step supports thereon.

Fig. 2 is a transverse sectional view through the stair well wall and forms therefore on the line 22, Fig. 1.

Fig. 3 is a horizontal sectional view through the stair well wall and forms on the line 33, Fig. 1.

Fig. 4 is a vertical sectional through the stair well illustrating the relationship of the two walls thereof.

Fig. 5 is a partial perspective view of a stair well wall with step supports and a precast step in disassembled spaced relation.

Fig. 6 is a longitudinal sectional view through the step construction on the line 66, Fig. 4, and illustrating the arrangement of the precast steps on the supports.

Referring more in detail to the drawings: a

'1 designatesa' stair well construction wherein precast concrete steps 2 having risers 3 and treads 4 are supported on projections 5 and 6 integral with and extending from adjacent sides 7 and 8 of walls 9 and 10 respectively. The walls 9 and 10 are of concrete and define the stair well which is poured in a form structure 11 preferably at the same time the concrete for the building foundation or basement walls are poured.

The form structure 11 for each stair well wall includes ice a plurality of inner form panels 12, 13 and 14 with panels 15 of corresponding width and heighth on the exterior and in spaced relation to the inner panels to define the concrete receiving space for the respective stair well walls. Each of the panels 12 to 15 inclusive is preferably formed of metal, the body of the form consisting of a metal sheet 16 having side edges turned approximately 90 degrees to form side flanges 17 and 18 and its end edges turned 90 degrees to form top and bottom flanges 19 and 20, each of the flanges 17, 18, 19 and 20 extending in the same direction from the sheet 16. Each of the panels 12, 13, 14 and 15 of each of the wall forms has sub.- stantially the same sheet and flange structure with the side flanges provided with a plurality of spaced apertures 21 adapted to align with apertures in the adjacent flanges of adjacent panels for receiving pins 22 for retaining the panels in side by side relationship. Thin bars 23 are arranged between adjacent flanges of adjoining form panels whereby the bars 23 extend from between the flanges on the panels 15 across the concrete receiving space and between the flanges on the respective forms 12, 13 and 14. The bars 23 have apertures 24 adjacent the ends thereof for aligning with the apertures 21 in the side flanges 17 and 18 whereby the pins 22 will extend through the apertures 24 and the bars 23 serve as spacers retaining the inner and outer forms in suitably spaced relation during pouring and curing of the concrete walls. It is preferred that ribs 25 be arranged in edge relation to the sheets 16 of each panel and extend horizontally and diagonally between the flanges 17 and 18 thereof, said ribs being welded to the sheet 16 and flanges 17 and 18 to form stiffeners for the body sheet of the form panels.

The inner form panels 12, 13 and 14 of the stair well walls each have laterally extending portions 26 defining cavities 27 for receiving concrete to provide the step supports 5 and 6. The projecting portion 26 may be pressed into the body panels or sheets 16 or may be fabricated as by welding a plurality of metal pieces together to form the desired projections. Each of the panels 12, 13 and 14 has upwardly and laterally sloping walls 28 inclined relative to the bottom flange 20 substantially the same incline as the steps will generally have relative to the horizontal. The lower edge of the wall 28 is suitably secured to the panel sheet 16. The outer or upper edge of the wall 28 is turned upwardly to define a wall 29 spaced from and substantially parallel with the respective sheet 16, the upper edge of said wall 29 being provided with substantially right angular related edges 30 and 31 corresponding substantially to the size and relationship of the under surfaces 32 and 33 of the treads and risers respectively of the precaststeps 2. The edges 30 and 31 are each connected by wall members 34 and 35 respectively that extend inwardly and are connected to the panel sheet 16 as at 36,

the walls 34 and 35 being inclined slightly relative from a perpendicular to the plane of the sheet 16 so as to provide draft that will allow the forms to be removed from the concrete projections without damaging the projections. The walls 34 and 35 are substantially horizontal and vertical. The portions of the sheets 16 of; the respective panels between the lower edge of the wall 28 and connection as at 36 between the walls 34, and 35 and the sheet 16 are cut away whereby the cavity, 27 of the respective panel communicates with the sp ce; The ends or Patented May stair Well walls with each panel in one wall directly opposite the corresponding panel 12, 13 and 14 on the other wall and with the projections 26 inclined thereon whereby each step supporting portion of the respective projections will be substantially in alignment. The horizontal and vertical surfaces 38 and 39 respectively of the projections on one wall are coplanar with, the corresponding horizontal, and vertical surfaces of the projections on the other wall whereby precast steps placed thereon will extend at right. angles to the walls and the treads of the steps being. level.

When the forms. are assembled as illustrated in Fig. 1-, and corresponding forms arranged to define thev other wall, concrete is, poured into the Space between the respective forms-I2, 13, 14 and 15" and allowed to set. Then the pins 22.. are pulled and; the forms stripped from the concrete leaving the walls. with the projections integral therewith and extending therefrom. The ends of the bars 23 are then beat and broken substantially flush with the inner surface of the concrete walls and then cement orgrout 40 is placed on each of. the substantially horizontal surfaces 38 of the supports 5 and 6' and then the ends of theprecast steps placed on said supports and cement or grout adjusted to level the steps, and then when the, cement or grout 40 is set the steps 2 are held firmly in place. For, ease in construction, the ends of the precast steps should in assembly be spaced slightly from the inner surfaces of the walls 9 and 10, and the space therebetween is preferably filled with cement as at 41 to provide a smooth finished joint between the steps and the walls. Form panels 12, 13, 14 and 15 can be assembled substantially as quickly as any other form panels of the foundation wall and also be stripped as easily from the poured concrete. Then the stair well is ready to receive the precast steps which are placed as quickly or quicker than can be done on finished buttresses or the like which my structure eliminates. It is, therefore, believed that it is obvious this step construction provides material savings in the building of steps in stair wells.

It is to be understood that while I have illustrated ,and described one form of my invention, it is not to be cast concrete treads and risers of such steps, a pair of spaced outer. upright form panels for defining the outer surfaces of spaced walls of a stair well, a pair of spaced inner upright form panels for, defining the inner surfaces of the spaced walls of a stair well, said inner form panels being spaced from the outer form panels to form a concrete receiving chamber therebetween, tie members we tending through the concrete receiving chambers and detachably secured to the respective inner and outer form panels for maintaining the spaced relation thereof, each of said inner form panels having a plurality of connected horizontal and vertical walls connected thereto in a stepped formation, said horizontal and vertical walls extending from the respective inner form panel toward the inner form. panel in substantially perpendicular relation thereto, said horizontal and vertical walls of one inner form panel being in the same planes as the corresponding horizontal and vertical walls of the other inner form panel and defining a stepped formation for step supports extending from the stair well walls, end walls for the step supports parallel to and spaced from the respective inner form panels and having a stepped formation connected to the ends of the horizontal and vertical walls of the respective inner form panels, said end Walls each terminating below the respective horizontal walls in a bottom edge inclined relative to the horizontal walls substantially on a slope corresponding to the general slope of the stairs, bottom walls connected to the bottom C'Ll of the respective end walls and sloping downwardly and toward the respective inner form panel and having the lower edge connected to said inner form panel, the said horizontal, vertical, end and bottom walls of each inner form panel cooperating to. define a cavity for re "incrotc when the stair wells are poured to form ions step supports integral with the stair well Cll cunuu walls.

2- In a form for pouring of concrete building stair ll walls with step supports thereon for receiving, prccast concrete treads and risers of such steps, a pair of spaced outer upright form panels. for defining the outer surfaces of spaced walls of a stair well, a pair of spaced inner upright form. panels for defining the inner surfaces of the spaced walls of a stair well, said inner formpanels being spaced from. the outer form panels to form. a con, crcte receiving, chamber therebetween, flanges. on the edges of the inner and outer form panels and extending therefrom away from said concrete receiving chamber, ribs fixed on the panels and extending between the.v flanges thereof, tie members detachably secured to the flanges of the respective inner and outer form panels for main.-

. taining the spaced relation thereof, each ofsaid. inner form panels having a. plurality of connected horizontal and vertical walls connected thereto in a stepped forma tion, said horizontal and vertical walls extending, from the respective inner form. panel toward the other inner form panel in substantially perpendicular relation. thereto, said horizontal and vertical walls of one inner form panel being in the same planes as the corresponding. horizontal and vertical walls of' the other inner form panel and defining a stepped formation. for stepsupp'orts extending from the stair well walls, end walls for the step supports parallel to and spaced from the respective. inner form panels and, having a stepped formation connected.

to thefends of the horizontal and vertical walls of the lower edge connected to said inner form panel, the saidhorizontal, vertical, end and bottom walls of each inner form panel cooperating to define a cavity for receiving. concrete when the stair wells are poured to form continuous step supports integral with the stair well walls.

' References Cited in the file of this patent UNITED STATES PATENTS 718,429 Conway Ian. 13, 1903 2,068,302 7 Nickol Ian. 19, 1937' 2,441,617 Clark May 18,, 1948 2,558,615 Johnson June 26, 1951 2,577,864 Thornton et a1. Dec. 11, 1951 2,652,614 1953 Como Sept; 22,

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