Abstract: The present staircase includes a permanent framing made of metallic stringers, one of which being typically secured to a half-timbering. Vertically extending step supports are secured along the stringers and each include upper and front flanges adapted to be secured respectively to a tread and to a riser of each step of the staircase. A temporary staircase may be easily obtained with the present kit for use during construction, wherein a number of L-shaped steel step units are laid onto the step supports to form a successive series of alternating risers and treads. Then, these L-shaped steel units can be removed and replaced by finished steps of various configurations. If the staircase has an exposed side, a finishing stringer is provided thereat to conceal the structural metallic stringer.

Abstract: The present staircase includes a permanent framing made of metallic stringers, one of which being typically secured to a half-timbering. vertically extending step supports are secured along the stringers and each include upper and front flanges adapted to be secured respectively to a tread and to a riser of each step of the staircase. A temporary staircase may be easily obtained with the present kit for use during construction, wherein a number of L-shaped steel step units are laid onto the step supports to form a successive series of alternating risers and treads. Then, these L-shaped steel units can be removed and replaced by finished steps of various configurations. If the staircase has an exposed side, a finishing stringer is provided thereat to conceal the structural metallic stringer.

Abstract: Benches are proposed for use in the production of modular stairways. A bench for mounting step supports to stringers of a modular stairway frame comprises racks for holding stringers therein, jigs for releasably locking the step supports therein, and a mechanism connecting the racks to the jigs for (i) equally spacing and rotating the steps supports adapted therein with respect to the racks, and (ii) mounting identical or symmetrically identical step support and stringer assemblies. A bench for mounting an angled step post of a modular stairway frame comprises jigs for holding support plates and vertical posts, frames for holding step supports, and a mechanism connecting the jigs and the frames for ensuring a precise distancing of the support plates, the step supports, and the vertical posts adapted therein.