Bluff 113″ ibc stairway, stair36i-17-113. because your elevation transition needs are quite specific to your worksite and operation systems, bluff manufacturing starts its product planning with an assessment of your current application as well as an inventory of your needs. Professional design engineers then develop a plan which can either be integrated into your existing installation or can be a new, freestanding installation. All of our stairway systems are in strict compliance with existing ibc, ubc and osha requirements. Manufactured with structural steel, stairways are a bolt together design which ensures maximum strength and rigidity. stairway specifications include: standard width of 36″ with customization available tread options of bar grate or diamond plate tread closed risers custom sizes and configurations (straight, l-shaped and u-shaped runs with intermediate landings) stair tower systems are designed to meet your exact height and space requirements standard stairway consists of three parts: two stringers with welded handrail and grip rail; and treads bolted between stringers