For manufacturing stair, grating panel is initially cut & then other parts of stair are connected to the grating. This assembly is a reliable, standard & safe stair that is used in staircases & passages between floors. The main parts of stair:
۱-Grating: the main part of stair contains typical grating panels which can be used as plain or serrated gratings.
۲-Side plate: side plate is used to easily connect stair to the structure. Punching method is defined according to the standard for different types.
۳-Nosing plate: this part is made of knurled plate which is between 32 to 36 mm in width. The tasks of nosing plate are:
a. Increasing stair strength
b. Increasing friction & preventing slippage
c. Increasing safety because of curvature at the front part
d. Separation of stair edge in the structure & installation location for increasing safety factor