US 4,050,203 AGranted

Stairs and railing system for multi-floored buildings and method of constructing same

OwnerThomas Souza, Jr.inventor

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Abstract

A stairs and method of constructing same is disclosed for multifloored buildings having walled stairwells. Each run of stairs comprises parallel spaced apart stringers having horizontally extending ends for mounting platform members and a plurality of spaced apart risers secured to the stringers intermediate the ends for supporting tread members. The platform and tread members are made of reinforced concrete and contain threaded inserts to receive bolts for mounting them to the stringer ends and risers. A parallel set of stringers are temporarily supported in position prior to the construction of and being secured to the walls of the stairwell by jacks or the like positioned between platforms positioned on the ends of the stringers and the underside of the ends of an adjacent set of stringers.

Claims10

Dependent claims

A stairs for multi-floored buildings having a walled stairwell, said stairs comprising:

1. A first set of parallel, spaced apart stringers having platform mounting means integrally formed with and extending a distance from each end thereof;
2. a second set of parallel, spaced apart stringers also having platform mounting means integrally formed with and extending a distance from each end thereof, said second set of stringers being positioned adjacent said first set and extending opposite thereto, said first and second set of stringers each having spaced apart tread mounting means secured to said stringers intermediate said platform mounting means;
3. a platform member having four sets of spaced apart threaded inserts formed integrally therewith, said platform being secured to said platform mounting means on said first set of stringers by bolts extending through said platform mounting means and tightened into two of said four set of inserts and said platform being secured to said platform mounting means on said second set of stringers by bolts extending through said platform mounting means and tightened into the remaining two of said four platform mounting means and tightened into the remaining two of said four sets of inserts;
and
4. a plurality of tread members having at least two spaced apart threaded inserts formed integrally therewith, said tread members being secured to said treat mounting means by bolts extending through said tread mounting means and tightened into said inserts.

2 more elements

Dependencies are inferred from the claim text.