Larger IBC measurements mean these stairs have a bigger footprint than OSHA stairs. As a business, you want the most value out of your facility’s limited space, so it pays to invest in equipment that requires less square footage.
Here’s a side-by-side comparison. In order to access a 12-foot-high platform, an IBC stair would need 21 steps (7-inch rise, 11-inch tread), making the entire horizontal run of the stairs 19.25 feet. Assuming the minimum width of 36 inches, the floor space used by these stairs is 57.75 square feet. That’s a lot of space used for a staircase! (Also keep in mind that any IBC stair higher than 12 feet must also incorporate an intermediate landing area, taking up even more room.)