Stair Stringer Throat Thickness

How to build safe stair stringers that don t sag squeak collapse or lose their treads.

Stair stringer throat thickness.

Codes strength requirements for stair support systems. Stair stringer notching template. 3 for 9 stringer 5 for 11 stringer 8 for 14 stringer. The height and width of the steps.

S and standard value in a private house taking 90 110 cm if space is limited a width of the opening sause the minimum critical value 80 cm. For concrete stairs select concrete thickness and enter the throat thickness see diagram and stair width to calculate formwork dimensions and concrete volume. According to standards the maximum height of stairs may not exceed 200 mm. This article describes the construction and building code specifications for the support of residential stairways.

Running measurements vertically lower floor to top of each tread. Timberstrand lsl stair stringers and sturdistep stair treads specifier s guide 9010 ember 2015sept 2 1 1 3e timberstrand lsl sairt stringers suggested residential stringer attachment details 40 psf live load and 12 psf dead load high end 1 minimum throat depths may be reduced by an additional for 117 8 and 14 material depths if 2x4 reinforcement is. Timberstrand lsl stair stringers and sturdistep stair treads specifier s guide 9010 september 2015 2 1 1 3e timberstrand lsl stair stringers suggested residential stringer attachment details 40 psf live load and 12 psf dead load high end 1 7minimum throat depths may be reduced by an additional for 11 8 and 14 material depths if 2x4 reinforcement is. Otherwise it is left to the builder s common sense experience and available rules of thumb to prevent the stringers for a 10 foot flight of stairs to be constructed from two 2x8s.

Might get shot for this but as i recall from wood framing days throat depth. The only guidance provided to a builder for the structural capability minimum throat depth of wood framed stair stringers comes from a carpentry handbook. If you plugged in the run 4 you would end up with 6 risers. This is a part of the plan that everyone got a simple stair stringer with 4 risers 4 treads.

The width of the opening of the stairs.