US2330148A - Concrete step - Google Patents

Description

Sept. 21, 1943.

E. A. ROGGE CONCRETE STEP Filed Dec. 9, 1941 2 Sheets-Shut 1 sepfl 1943- EA. ROGGE 2,330,148

CONCRETE STEP 4 Filed Dec 9. 1941 2 Sheets-Sheet 2 "III/III Patented Sept. 21 1943 UNITED STATES PATENT OFF'ICE CON C RETESTEP Edward A. Bogge, Marinette, Wis. Application December 9, 1941, Serial No. 422,291

ain (o1; ra -9s) This invention relates torastep or stair con-' struction, and more particularly to a precast concrete step or stair.

An object of this invention is to'provide a-stair construction which can be preformed in knock-' down form and set up easily and quicklyat the desired location.

Another object. of this invention is to provide, a stair construction whereina treadis cast integralwith a riser and each tread at ther'ear thereof is formed with a locking lug forJengagement with a succeeding riser. l

A further object of this invention is to provide in a stairrof this kind a removable plug for receiving a rail supporting post. 1

A further object of this invention is to provide a stair of this kind which is so constructedv that it is self-supporting, so that it may beset up on the exterior or interior ofzra building :at 7| the desired location. a e

To the-foregoing objectsand others 4 which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically referred to andillustrated in the accompanying drawings, but it is to be understood that changes,

variationsand modifications may be resorted to which fall within as claimed;

In the drawings: a I

the scope of the invention Figure 1 isa detail side elevation of -a'stairor-step structure constructed to- 'an embodiment of this invention,

- Figure 2 is a top the structure, Figure 3 is a sectional view taken on theline 33 of Figure 2, t

Figure 4 is a sectional view taken on the line 4--4'of Figure 3, it

Figure 5 is a perspective view of one of the combined tread and riser members,

Figure 6 is a fragmentary sectional view on the line 6-6 of Figure 3, and a a Figure 7 is a fragmentary sectional viewtaken on the line 1-1 of Figure 6.

-Referring to the drawings the numerals. m. and II designate generally a pair of vertically disposed or upright side members for supporting stair treads in the desiredlocation with respect to a building. The two supporting members l0- and H areof like construction and each in? cludes ahorizontally disposed baseumember. l2:

which is preferably formed of concrete suitably reinforced by embedded metal elements or the like, and the base member l2 has cast integral takendisposed. andforwardly extending tread supporting' member Il l. Thetread supporting member l4 has the upper surface thereof disposed inparallel relation with the basel2 so asto support a tread in :a horizontal position. Each tread p -A relatively thin'panel supporting member M has formed integral therewith a.depending downwardly, and forwardly extending supporting member 'lli. {The supporting member-flfi'is inclined to thevertical, and the first supporting member is formed integral with the base I 2 whereas'succeeding 'supporting member-s 5 are formed integral with the tread supporting :members l4 and the uprights l3. i

I6 is disposed between pairs "of uprights, l3 "and adjacent tread sup-- portinggmembers [5! "These panels I6 are provided in orderto close the space between the uprights l3. Y I 'Inorder to'provide a means whereby the two side members I0 and ,H may be held in a vertical-position, I have-provideda pair of crossed orintrsetztingbracingmembers I I and-l8. The

plan partly broken away of Y a v i bracing members I! and I8, shown more clearly in Figure -4 are each provided with flattened angularly disposed opposite end portions l9 which are adapted-to engage-inwardly project ing bolts Zflgwhich have the outeriportions there- 1 of embeddedin' the side members If! andl I; A nut 21 is threaded onto each bolt 20 so as to tightly hold the bracing members I! and I8 in' operative position. The upright ID at the rear portion thereof is formed with aninwardly projecting foot or base plate "22, and the side member' ll is also formed'with an inwardly projecting baseffoot23. The two- feet 22 and 23 provide additional surface engaging means for the side members I 0 and II to prevent these sidev members from sinking into the ground 'or' othersurface. v r t p A' lowermost combined treadfand riser member generally designated as 7.24 is mo'untedon the forward or projecting end'portions' of the two base members l2. The-combined tread and riser member 24 includes a horizontallydisposed flat tread member 25 which engages on the upper side'of the base members. l2 forwardly of p the foremost riser supporting or bracing member; l5, The-two base members l2 areeach provided in their upper surface thereof with a V-shaped k way. or n c 26 i i w ich a V-shaped key 21, carried by and formed integral with the tread member 25, is adapted to engage.

The keys 21 are adapted to hold the lowermost tread member 25 against forward or rearward movement with respect to the base members l2. Each base member I2 at its forward end is formed with an inclined surface 28 which is inclined to the vertical, being inclined upwardly and rearwardly, and a depending riser member 29 is formed integral with the tread member 25 and is adapted at its rear face to abut against the inclined faces or ends 28 of the two base members l2.

The riser member 29 is formed with a vertically disposed forward side or face 30, and with an inclined rear side or face 3| which is disposed on V w an angle coincident with the inclination of the forward ends 28 of the base members l2. tread member 25 adjacent the opposite end portions thereof is formed with openings 32 within which removable plugs 33 are adapted to engage. The plug 33 may be formed out of concrete or the like, and areprovided so that in the event the userof this stair desires to secure side rails thereto, the plugsy33' may beforced out from the tread- 25, and a rail supporting post or the like may be secured at its lower end in the opening 32.

The tread member 25 at its rear edge is formed The r receive rail supporting posts or the like. In the use and construction of this stair structure the two side members l0 and H may be constructed separately as individual units, and as many of the combined tread and riser members maybe also precast to form the desired steps.

with a pair of rearwardly extending substantially The two locking members 34 are disposed wardly from the opposite end portions of the. tread member a suflicient distance, so; that these locking members 34 may engage against the inner sides of the upright members In and H and thereby hold. the: tread members'25 against endwise movement.

A succeeding combined tread and riser member 38 is adapted to engage the first tread supporting member l4 and, the: riser member 39 is adapted at its lower edge.- to engage in the. two channels 31 formed bythe locking members 34 and the rear portion of, the; tread member 25. A tread member 40 is formed integral with. the riser 39,.

' and rests upon the succeeding tread supporting.

member 14 following the treadmember 25.. The

rear edge portion of, the; tread member 25 isrformed 1* with a forwardly ofiset edge portion 41 which forms an open slot between the rear edge of the tread 25 and the forward side of the succeeding riser 35. The slot 4| as shown in Figure 5 is disposedsbetween the two loclr. members carried bythetread member 25 and is designated for the purpose: of draining. water at the rear of each'tread. The

combined tread and riser member 38 is formed It willbe understood that there may be as The lowermost combined tread and riser member 24 is initially mounted on the two spaced apart base members 12' after'the side members iO' and U have been secured: togetherin upright position by means of the two bracing members l1 and I3. The succeeding combined tread and riser members 38 may then bemounted' onthefsucceeding tread supporting. member l4. Thesesuceeding tread and riser members 38 will have the riser portions-"i9 thereof. engaging in: preceding lock channels, sothat the succeeding combinedtread and riser members will be held against, movement relative to each other, and'the lowermost tread and riser member 24 will: not'only be held against movement relative: to the succeeding tread and risermember 38', but will: also be held 1 against forward onrearward movement relative to the two side members i0- and' H by engagement of the keys 21in. the keyways' 2ii;

The tread and riser members 38 at the rear edges are adapted to abut against the adjacent supporting members [5, and.a pair of locking members 42 carried: :by each tread and riser member 38 will hold these' latter members against endwise movement: with respect to the side members tit and H. In; like manner the 4 locking members 34 will hold the lowermost com-' bined tread and riser member, 24' againstend wise movement with respect. to the side members- In and H.

This stair construction as hereinbefore' statedmay be precast in suitable forms constructed for that purpose,. and can be easily,- and quickly set up in, the desired: location: without the: use of: any plastic, concrete, or cement, By: forming: the combinedtread and riser members insertible units, these tread and riser members "may be easily replaced-in the eventwtliey become broken or otherwise damaged. A- stair constructed. according to thisi-nverrtion may be constructed at a considerably reduced cosmifrom-i an; ordinarily solid concrete stair orste'p'structure and at the same: time willprovide ifor theneces sary expansion and contractiomofthe. material ing; fromthe' rear portion of said base, and treadi: supportingcmeans: carriedi'by thewbase, said tread' supporting: means comprising aseries. of stepped: inclined: supporting? membersr carrying; a series; of stepped horizontail tread supporting: members;

combined tread and riser members seated on sai di tread supporting members; said combined new and riser members compri'sin'g w wedge-sh'aped downwardly tapering riser member and a hori- V zontal tread member integrally formed there with, said tread member having the central portion of its rear edge forwardly offset to provide a drain opening, a pair of spaced apart substantially L-shaped locking members carried by the rear edge of said tread member for engagement with the lower edge of the succeeding riser, and a pair of crossed brace members each extending from the upper rear portion of one of said upright side members to the lower rear portion of the other of said side members.

2. A self-sustaining precast stair structure comprising a pair of cast integral upright side members, each of said side members having a ground supported base member of a length substantially equal to the depth of the stair structure, a series of stepped horizontal supporting members, a series of upwardly and rearwardly inclined uprights carrying the forward portion of said horizontal supporting members, means for supporting said uprights from said base memher, an inwardly extending foot carried by the lower rear edge of said base member, a pair of crossed brace members extending from the upper rear portions of said side members to the opposite lower rear portions of said side members, and

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