10 foot high staircase using steel grate treads, steel arms to hold up the steel handrail, and held together by steel side rails as well as steel reinforcing rods underneath the steps. Staircase rises at 7 inches per tread as per standard usage. Steps are about 1 foot deep. Welded bolts hold everything together, the bottom step has 4 steel feet, the top step has two extended flanges with pre-drilled holes to allow it to be mounted to the bottom of the upper floor #metal #passenger #pedestrian #staircase #stairs #stairway #steel
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