11 Aug '17, 1pm

For GBA subscribers: An overview of stair design, with a look back at NAHB's campaign against the 7-11 stair.

For GBA subscribers: An overview of stair design, with a look back at NAHB's campaign against the 7-11 stair.

Every open stair needs a guard (something along the sides to keep people from falling to the right or the left). If the guard has balusters, the spaces between the balusters shouldn’t be wider than 4 inches. Every stair needs a graspable handrail (a round handrail with a diameter of about 1 1/2 inch). Note that a graspable handrail isn’t the same thing as the rail at the top of a guard. The height of a handrail should be 34 to 38 inches above the tread nosing. Risers need to have a consistent height. It’s dangerous for the stair's top riser or bottom riser to have a different height from the other risers. Carpenters who cut and install stringers sometimes fail to consider all of the relevant details, which may include the thickness of the subfloor on both floors, the thickness of the finish flooring on both floors, the thickness of the rough treads (if any), and the thickn...

Full article: http://www.greenbuildingadvisor.com/articles/dept/musings...

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From the archives: Back to Basics

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