Timber Stair Design
Timber Stair Design
(OP)
Looking at an architect's building plans and it shows the general location for timber stairs for a two story building on the plan views. Structural notes give basic dimensional details such as riser height, tread depth, handrail height, etc.
As far as being the structural engineer, is it common practice to specify the design loads for the contractor to select a supplier's product that meets my requirements? Or should I design each component (stringers, risers, and treads material thicknesses and nail and bolt connection details) for the contractor to construct? Or should I check the IRC for some typical stair designs and subsequent allowable load tables. As far as the IBC, I see spacial requirements but no design aids or tables.
Thanks,
JAS34
As far as being the structural engineer, is it common practice to specify the design loads for the contractor to select a supplier's product that meets my requirements? Or should I design each component (stringers, risers, and treads material thicknesses and nail and bolt connection details) for the contractor to construct? Or should I check the IRC for some typical stair designs and subsequent allowable load tables. As far as the IBC, I see spacial requirements but no design aids or tables.
Thanks,
JAS34






RE: Timber Stair Design
On some other jobs we'll design the stringers, landings etc., but don't typically design the treads and connection of the treads to the stringer. I would think if you are doing a residence (since you are quoting IRC) that there are conventional attachments of these components.
RE: Timber Stair Design
I just considered looking in the IRC for relative information to point me in the right direction since the IBC had no design information.
RE: Timber Stair Design
What material are you using?
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Timber Stair Design
RE: Timber Stair Design
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Timber Stair Design
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
RE: Timber Stair Design
Like when the paper delivery guy has about 4 boxes of paper on a dolly!!
RE: Timber Stair Design
Looking now at the timber porch railing on this commercial building.
Looking for the standard construction practice for wood post and railing attached to concrete masonry.
It is a concrete masonry wall opening that is to have wood posts, hand rail, top and bottom rails, and struts.
I am thinking 4x4 timber post embedded in the grouted concrete masonry using post base-ties from Simpson Strong tie. Cap the post with a 2x6 hand rail. Then 2x4 top and bottom rails. Last, 2x2 vertical struts at 5" o.c.
Any design tables (like woodman88 presented for the stairs), engineering experience, etc. out there that gives me a "prescription" design approach for the timber porch detailing?
- JAS34
RE: Timber Stair Design
RE: Timber Stair Design
RE: Timber Stair Design
RE: Timber Stair Design