Stairs design construction a stair is a system of steps by which people and objects may pass from one level of a building to another a stair is to be designed to span a large vertical distance by dividing it into smaller vertical distances called steps. Mental or circular stairs. Structural steel components tread. The tread is the piece of steel that makes up the steps of the stair.
Stair terminology the tread can be made from grating or from pans both shown in figure 1. Grating is typically used in industrial buildings while pans are usually used in commercial structures. Fixed industrial stairs january 2017 process industry practices page 4 of 11 39 stair railing shall comply with the requirements of pip stf05520 or pip stf05521. 310 stair assemblies shall be coated after fabrication in accordance with the design drawings and the specifications governing the project.
Galvanizing when required shall be done. Stairs ladders and walkways part 3. Code of practice for the design of industrial type stairs permanent ladders and walkways. Provides immediate use of stairs precast treads of various design can be used provide model number of tread before design begins xsmooth plate treads pg 1 3 provides immediate use of stairs not slip resistant until coated useful for carpeted or rubber coated stair designs carpet or rubber coating providedinstalled by others.
Metal stairs metals arcat offers free cad blocks drawings and details for all building products in dwg and pdf formats. Your complete source for finding. Architectural cad drawings and blocks for download in dwg or pdf formats for use with autocad and other 2d and 3d design software. Fixed aluminum industrial stair precision.
Application of requirements this section contains specifications for the safe design and construction of fixed general industrial stairs. This classification includes interior and exterior stairs around machinery tanks and other equipment and stairs leading to or from floors platforms or pits. 191025a applicationthis section covers all stairways including standard spiral ship and alternating tread type stairs except for stairs serving floating roof tanks stairs on scaffolds stairs designed into machines or equipment and stairs on self propelled motorized equipment. Research has shown that the physical dimensions of stairs play a significant role in stair accidents.
Consistency of stair dimensions is very important. Even small differences in the rise or going between adjacent steps can cause someone to misstep which can lead to a fall. In addition the rungs and steps of portable metal ladders must be corrugated knurled dimpled coated with skid resistant material or treated to minimize slipping.