Stair Stringer Throat Thickness

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.

Stair stringer throat thickness.

The only guidance provided to a builder for the structural capability minimum throat depth of wood framed stair stringers comes from a carpentry handbook. Might get shot for this but as i recall from wood framing days throat depth. This is a part of the plan that everyone got a simple stair stringer with 4 risers 4 treads. According to standards the maximum height of stairs may not exceed 200 mm.

The width of the opening of the stairs. The height and width of the steps. Usually 15 17 cm optimal width of a step 27 30 cm. Codes strength requirements for stair support systems.

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. Stair stringer notching template. 3 for 9 stringer 5 for 11 stringer 8 for 14 stringer. If you plugged in the run 4 you would end up with 6 risers.

For concrete stairs select concrete thickness and enter the throat thickness see diagram and stair width to calculate formwork dimensions and concrete volume. This article describes the construction and building code specifications for the support of residential stairways. What made it more challenging is if you simply plugged the rise in to a construction calculator you would end up with 3 treads. 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.

How strong should the stringers be and what are the load bearing requirements of stairs and their.