US1745087A

US1745087A - Concrete step and the like

Info

Publication number: US1745087A
Application number: US284327A
Authority: US
Inventors: Charles D Floto
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-06-11
Filing date: 1928-06-11
Publication date: 1930-01-28
Anticipated expiration: 1947-01-28

Description

Jan; 28, 11930.

c. D. FLOTO 1,745,087

CONCRETE STEP AND THE LIKE Filed June 11, 1928 Z Sheets-Shae- 2 Patented Jan. 28, 1930 UNITED ST CHARLES D. FLOTO, F

CONCRETE STEP Application filed. June 11,

This invention relates to concrete steps, stadium seats and the like, and more particularly to constructions of this character having their parts pro-formed ready for as sembling when desired.

An object of this invention is to dispense with the forms or molds usually employed in construction of this kind, by providing parts or sections adapted to be molded at a factory or plant where they can be pre-formed rapid ly and cheaply.

Another object is to provide a concrete construction of the above kind embodying parts so formed that they may be easily and eXpeditiously assembled and joined.

Still another object is to provide a construction of the above kind which is extremely strong and durable, light in weight, and economical to manufacture and erect.

A further object is to provide an improved pro-formed unit or section for constructions of the above kind, embodying a riser and a rearwardly extending tread integral with the upper edge of said riser. A still further object is to provide for assembly of the parts so that the treads are locked in the stringers and the risers are locked in the treads to insure against relative displacement of the parts in use.

he invention consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings Figure 1 is a fragmentary front elevational View of a stadium construction embodying the present invention.

Figure 2 is a vertical section taken substantially on line 2-2 of Figure 1.

Figure 8 is an enlarged detail section taken on line 3-3 of Figure 1.

Figure 4 is a perspective view of one of the pro-formed riser and tread units shown in Figure 1.

Figure 5 is an enlarged fragmentary perspective view of one of the stringers; and

Figure 6 is a view similar to Figure 4 of a riser and tread unit for use in step constructions.

Referring more in detail to the drawings,

STEUBENVILLE, OHIO AND THE LIKE 1928. Serial No. 284,327.

the present invention contemplates the construction of concrete steps, stadiums and the like, and includes stringers 5, each consisting of a concrete body having metal reinforcing rods 6 embedded therein. Each stringer is devoid of tread or riser portions and has a straight upper edge in which squared transverse recesses are formed at regular intervals.

The construction further embodies a plu rality of pre-formed concrete units each comprising a riser 8 and a. rearwardly extending tread 9 at the upper edge of said riser and in tegral with the latter, said riser and tread having a series of transverse rods 10 and cross rods 11 embedded in and reinforcing the same. The tread 9 of each unit is provided in the upper side of its rear edge portion with a longitudinal groove 12 to snugly receive the forwardly beveled lower edge 13 of the riser of the next higher unit. Below its grooved portion each tread is provided with a squared depending rib l l adapted to snugly fit in transversely alined recesses or notches 7 of the stringers 5 at the ends of the units and to reinforce the tread. The riser 8 inclines rearwardly from the tread integral therewith, thereby insuring ample foot room on the next lower tread and permittinguse of treads of in i r. imuni wi dth.

in assembling the parts, the stringers 5 are arranged in spaced parallel relation, and the tread and riser units are then assembled and interlocked. with the stringers and each other as illustrated, asphalt or mortar being employed to unite the units at the

joints

12, 13. In this way, the ribs it are seated in the recesses 7 and the risers 8 are arranged with their lower edges seated in the grooves 19, of the treads, thus insuring against relative displacement of the parts in use, although permitting the construction to be readily taken apart and set up for use in a new location.

In the construction of steps, the tread of unit will be plain as shown in Figure 6, but in the case of stadium construction the tread of each unit will be formed with integral upstanding supporting lugs 15 at the ends ofits forward portions so that the ends of the seat boards 16 may be secured thereon.

As shown, nuts 17 are embedded in the lugs 15 in registry with holes opening through the tops of said lugs, so that bolts 18 may be passed through the ends of the seat boards 5 and threaded into the nuts to bolt the ends of said seat boards in place and firmly on the flat upper faces of the lugs. The seat boards are thus spaced from the treads except at their ends so as to readily yield and to permitcirculation of air as is desirable in construction of this kind. The circulation of air is also permitted between the ends of the units and the stringers by making the latter without riser and tread portions. The stadium sections are placed end to end as shown in Figure l, with the end-joints bet-Ween adj acent unitscaulked with asphalt as at 19.

Minor changes may be made Without departing from the spirit and scope of the in- \ention as claimed.

What I claim is 1. In a concrete stadium structure, having integral tread and riser elements, stringers provided with notches for receiving the tread elements which have correspondingly shaped projections engaging said notches, the tread elements having grooves for the reception of tongue elements on the risers the tongues and grooves extending the entire length of said.

89 tread and riser elements.

2. In aconerete stadium structure, having integral tread and riser elements, stringers provided with notches for receiving the tread elements which have correspondingly shaped 36 projections engaging said notches, the tread elementshaving grooves for the reception of tongue elements on the risers the tongues and grooves extending the entire length of said tread and riser elements, the grooves in the t0 mead elementbeing formed at an acute angle for receiving cooperating portions of the tongue elements.

3. In a concrete stadium structure, having integral tread and riser elements, stringers 6 provided with notches for receiving the tread elements which havecorrespondingly shaped projections engaging said notches, the tread elements having grooves for the reception of tongue elements on the risers the tongues and 5D grooves extending the entire length of said tread and riser elements, the tread elements being provided with integral upstanding seat board supporting lugs.

In testimony whereof I aflix my signature.

CHARLES D. FLOTO.