US1753234A - Metal riser and nosing for concrete steps - Google Patents

Description

April 8, 1930. s. A. ,7 3,

METAL RISER AND N O S i I;IG "FC )R CONCRETE STEPS Original Filed Sept. 12, 1927 9 IIIIIIIIIIII 50 INVENTOR.

i ATTORNEY.

Patented Apr. 8, 1930 SETH A. corn, or sAn rRAncIsco, OALIFGRN-IAV METAL RISER AND NOSING. FOR GONCRETE STEPS,

Application filed September 12, 1927, Serial N'o. 218,913. Renewed September 10, 1929.

This invention relates to a metal rising and nosing for concrete steps, and its object is to produce a riser and nosing which may be used in the construction of any concrete steps where the centering is made use of, or in connection with old steps where the face of the concrete is broken off and a new layer of facing put on behind this nosing.

Another object of the invention is to produce a facing which will be practically indestructible and which will be sufficiently secured to the concrete at all points to make certain that it will not crack 01f or come loose.

Another object of the invention is to provide a metal facing and nosing which will be capable of holding the sheet mastic or other surface used on concrete steps in place, and which will be capable of indefinite wear.

Other objects of the invention will be apparent as the description proceeds.

An embodiment of the invention is shown in the accompanying drawings in which the same reference numeral is applied to the same portion throughout the several figures of the drawings and of which theremay be modifications.

Figure 1 is a vertical sectional view through a set of concrete steps showing this nosing in place and two of the steps concreted,

Figure 2 is a View of the nosing and riser" looking from the right Figure 1.

Where new steps are being laid there is a a wooden side board similar to the side board which is at each end of each step extending the entire length of the flight of steps, and extending across from one side board to the other there is a wooden floor 2. This sheet steel riser is then put in posit-ion as indicated in Figure 1, the riser consisting of a flat sheet bent to produce the differently inclined planes 4 to 9 inclusive. The plane 4 is bent backwardly out of the vertical riser 5 so as to engage the concrete below the surface of the concrete top 10.

To produce the nosing the blade is bent forwardly to produce the plane 6, then upwardly to produce the plane 7, and then horizontally to produce the top of the step at its outer edge. At the back of the plane 8 the I step is bent downwardly as indicated at 9 to the rightheight above the floor 2, and when give the sheet metal a good hold on the concrete and to increase this holdthere are a plurality of holes formed in it as indicated at 11 to 16 inclusive. A short length of wire is then run through these holes and'twisted to form a loop as indicated at 17. k This rough loop of wire being arranged to extend back into the concrete eight or ten inches.

Spot Welded on the plane 6 inside'the same are several clips '18 to 20 inclusive, the number depending entirely upon the width of the step and the necessity for strength.

' Near the lower portion of the plane 5 there are two nuts 21 and 22 spot welded thereto. Thesenuts each receive a bolt 23, said bolt having one end threaded and the other end flattened and bent witha hole in it to enable a nail 25 to be driven into the centering 2 to hold the riser in the proper position during the time the concrete is being poured, and also to give additional strength.

In practice the board is turned one away or another to give the riser and nosing precisely this is complete the nails 25 are driven into the floor to hold the riser and nosing in the desired position.

Since the effect of tamping is to force the rising and nosing outwardly, a 2 x 4 brace as indicated at 27 may be used to aid in holding the nosing and riser during the time the concrete is being poured into the pan. g It will also be noted that each of the clips 18 to 20 has a wire extending therefrom as indicated at 28 to a nail 29 that has been driven to the bottom of the centering. Precisely this same construction without the boards may be used for refacing and renosing old concrete Stairways in which event the back of the step is dug down to receive the plane 4 at the desired depth, and the front of the old nosing is broken off to allow the partsl', 8 and 9 to take their proper position in relationship to the steps. In the present instance it is very convenient tohave the nosing and edge of theplane 8 project about one-half an inch above the top of the finished concrete, this space being filled by a mastic covering 30..

Having thus described my invention, what I desire'to secure by Letters Patent of the United States is as follows, but modifications may be made in carrying out the invention as shown in the drawings and in the above particularly described form thereof, within the purview of the annexed claim:

A device of the class described comprising a sheet metal strip having a portion of the bottom edge bent backwardly, a vertical portion, a portion bent forwardly at an angle therefrom, a second vertical portion, a horizontal portion bent back from said second vertical portion, a portion bent down from said horizontal portion, a series of holes in said bent down portion adapted to receive reinforcing wires, a plurality of clips fixed to said angle portion, holes in said clips to receive reinforcing wires, a pair of threaded nuts fixed to said first vertical portion, threaded bolts in said nuts, said bolts adapted to extend to the bottom board of a stair frame, and means to attach the lower ends of said bolts to said bottom board. 7

In testimony whereof I have hereunto set my hand this 24th day of August A. D. 1927.

SETH A. COPE.

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