US1792792A

US1792792A - Stairway construction

Info

Publication number: US1792792A
Application number: US262547A
Authority: US
Inventors: Arthur L Woodbridge
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-03-17
Filing date: 1928-03-17
Publication date: 1931-02-17
Anticipated expiration: 1948-02-17

Description

Feb. 17, 1931. A. L.. wooDBRlDGE 1,792,792

STIRWAY CONSTRUCTION Filed March 1'?, 1928 la Ja A umn s u am Zwem/if? Patented Feb. `17, 1931 j U n i r ARTHUR L. WOQDBRIDGE, OF CHICAGO, ILLINOIS 4 STAIRWAY oolvs'imromroir Y y v Application inea March 17, 192s. serial No. 262,547.

This invention relates to a stairway construction and has special reference to a con crete and metal stairway of'a standardized constructionV which is adaptable for use in 5 any building.

j More particularly, this invention relates to a safety nosing to be used on stair cases of metal and concrete construction, the nosing being applied to the forward edge of the tread and extending the full width thereof. Being so positioned, the nosing receives the greatest i wear and it is, therefore, desirablel that the nosing may be readily removed and replaced when necessary. j

One of the objects of this invention is to provide a safety nosing for stair cases of metal and concrete construction which nosing will be supported in a mannerv as to not detract from the appearance of the stair and will be assured against breaking away from the concrete fill.

A further obj ect of this invention is to provide a safety nosing of an improved type which is renewable in a simple, Convenient and inexpensive manner without disturbing` the assembly ofthe staircase.

Other objects of this invention will be apparent from the description and drawing forming a part of this specification to which reference may now be had fora more complete understanding of` the characteristic features of this invention, in,v which drawing: Figure 1 is a perspective view'partially in section of a stair oase of metal and concrete which embodies the features of this invention; and,

Figure 2 is a top plan View, greatly reduced, of the structure shown in Fig. 1.

Referring now to the drawing, the stairi9 oase comprises tread and riser members, the latter members being preferably formed of a single sheet of metal having a tread portion 10 and a riser portion 11. These members are disposed between and supported by stringers 12. ln the particular construction shown, the supporting members may be angle irons 13 having one leg lyingbeneath the tread portionV and supporting it and the other leg portion extending upwardlyv adjacent the 5@ stringer and secured thereto. The upper end ofthe riser `portion 11 projects forwardly and upwardly, the extreme upper end 14C thereof "extending rearwardly in ajsubstantially horizontal plane. The forwardly eiltending portion 15 of the riser 11 is'preferably 5i inclined to support a forwardly inclined portion 16 of the tread 10 next above. These two inclined portions are suitablyV secured` together as by means of bolts `and nuts 17, the nut preferably being disposed on'the inner 60 side of the construction. e A safetynosing 18, preferably formed in the general shape of an angleiron, is secured v j to the horizontally extending portion `11`of the riser and extends across the full width thereof, the ends of thenosing abutting the stringers 12. The nosing is secured to the risers by means'of nuts and bolts 19, the nuts -being preferably disposed on theV inner side of the construction, that is, beneath the horizontally extending portion 14. Y Y By reason of the tread member 10 being secured to the riser' next below at a point below the upperend thereof, a recess is provided which is filledwith concrete 20 or any 75 composition filling to a plane coeXtensive with the upper plane of the nosing 18.

It will be particularly noted that any weight disposed on the nosing 18 willbe supported by the reinforced portion formed 90 by theconnection of adjacent tread and riser members and Vindicated by the letter A, and that with this construction,- the "nosing will not break away from the concrete or other filling 20. The lower edge of the depending portion of the nosing 18 is bevelled to conform to the inclination ofthe forwardly eX- tending portion of the riser 11. By reason of the particular construction thus obtained, the bolt heads Yare partially concealed and an even, balancedand attractive appearance is obtained when viewed in ascending the stairway. Further, by reason of the nuts of the bolts 19 being embedded inthe concrete or other fill V20, these bolts may ber unscrewed and again screwed into positionvreadily and easilywhen it is desired to renew the nosing, sincev the nuts are held against rotation by j the filling, The nosing 18 is" preferably made of Feralun when it is desirable to pro- 106 vide a material of a long life, although it is apparent that treads of other metals may be used. Also, wood, cork and the like may be adapted as a iill for various other conditions.

As a result of this invention, a nosing is obtained which is so constructed and arranged as to be readily removed when it is desired to have the same replaced. Further, a Constr ietion is aforned whereby the nosing will not break away from the concrete or other iill when a weight or force is exerted thereon due to the nosing being supported directly'over the reinforced portion indicated at Aj lVliile but a single embodiment of this invention is herein shownv and described, it is to be understood that the same is not to be limited to that specific construction since various modifications may occur to those skilled l in the art without departing from the spirit and scope of this invention, and it is, therefore, desired that the same be limited only by the showing of the prio art and the scope of the appended claims.

said overlying inclined portions.

3. r)The combination with a stair structure including tread and riser sections having forwardly and upwardly inclined portions secured together in an overlying relation, of

l an angularly shaped nosing removably secured to the horizontally extending upper end of said riser section directly above said overlying inclined portions.

il. The combination with a stair structure including tread and riser sections havingforwardly and upwardly inclined portions secured together in an overlying relation, of a nosing` removably secured to the horizontally extending upper end of said riser section dii rectly above said overlying inclined portions,

said nosinghaving a depending portion in engagement with the face of said riser and extending substantially to said inclined portions. Y

5. The combination with a stair structure including tread and riser sections having forwardly and upwardly inclined portions secured together in an overlying relation, of an angular-shaped nosing removably secured to the horizontally extending upper end portion of said riser section directly above and supported by said overlying inclined prtions.

6. The combination with a stair structure including tread and riser sections connected together at the forward and upper ends respectively thereof to provide a recessed flooring to receive and to support a filling of cont o an a11gulaisl1a} ied nosing overlying 'ending portion of said sections and having its upper surface flush with the upper surface of said concrete filling, and a nut embedded in said concrete `filling adjacent said extending portion for receiving a screw extending therethrough and through said nosing whereby said nosing is readily removable.

7. The combination with a stair structure including tread and riser sections connected together at the forward and upper ends repectively hereof to provide a recessed flooring to receive and to support a filling of concrete, of an angular-shaped nosing overlying an extending portion of said sections and having its upper surface flush with the upper surface ef said concrete filling, and a securing member having a portion thereof embedded in said concrete filling adjacent said extending portion for removably securing said nosing to said extending portion.

8. rl`he combination with a stairv structure including tread and riser sections connected together at the forward and upper ends respectively thereof to provide a recessed flooring to receive and support a filling of concrete or the like, of an angularly shaped nosing overlying an extending portion of said sections and being removably secured thereto.

9. The combination with a stair structure including tread and riser sections connected together at the forward and upper ends respectively thereof to provide a recessed flooring to receive and support a iilling of concrete or the like, of an angularly shaped nosing removably positioned at the forward exposed edge of said filling.

ln witness whereof, I have hereunto subscribed my name.

A. L. l/VOODBRIDGE.