Larger dimensions were not as acceptable to shorter subjects, and smaller dimensions were not as acceptable to taller subjects. The 4-in (102 mm) riser was almost totally unacceptable, and never preferred. The 5·14 and 9-in (131 and 229 mm) risers were acceptable to less than one-third...
A suction nozzle is provided which is comprised of a one piece outer cylindrical body member of predetermined fixed dimensions provided with an internal movable sleeve for adapting the nozzle to effectively and more conveniently extract dirt from carpeted stair treads or riser without changing the ...
· Full closed risers with timber The riser height, pitch angle and going depth are created specifically to suit the opening, staircase configuration and floor to floor height of the project. The stair is 'dry' fitted in the factory before dispatch to ens...
of straight lengths of reinforced concrete stairway, providing for rapid adjustment of the dimensions of treads and risers. It uses slidably interconnected tread and riser formers which are attached in pairs to a stepped screw. A stiffened angle iron (3, 4) forms each tread and the succeeding...
of straight lengths of reinforced concrete stairway, providing for rapid adjustment of the dimensions of treads and risers. It uses slidably interconnected tread and riser formers which are attached in pairs to a stepped screw. A stiffened angle iron (3, 4) forms each tread and the succeeding...
The treads (4) and the risers (5) of each half flight (2, 3) are identical and are respectively equal to and double the corresponding dimensions of a normal stairway. A conventional step (4a, 4b) i.e. with half the riser (5) generally used on the half-flights is located at the ...