Stair Design Guide: Difference between revisions

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Original design - [[File:stairs.fcstd]]
=2022 Working Doc=


<html> <iframe src="https://docs.google.com/presentation/d/e/2PACX-1vQO2wRsNE9CoxflTQ8pOgC17qKLZ7FnqMUvas5S_5CdB7mxekjVnU3PUyCXeynoTTyk4JSQJyIUgjKJ/embed?start=false&loop=false&delayms=3000" frameborder="0" width="480" height="389" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe> </html>


==Stairway for SeedHome v2==
[https://docs.google.com/presentation/d/1PVthbAE4RLofESfE-zPzF8QrbQlbA4nnpEpSbuGXxLs/edit#slide=id.g161b0a00624_0_16 edit]


[[File:stairs_test.png|100px]]
=2022 Version=
[[File:house_w_stairs.png|100px]]
We went from 2-'stringer'-blocking design (of [[2021 Stair Design Guide]]) to regular, 3-stringer design.
[[File:stairs_example.png|100px]]


===Step Size===
<gallery perrow=6 >


The steps are 42.125" wide and 11.25" deep with a 1.125" nosing
File:workginlandingdetail.png|'''Working landing utility channel detail.'''  [[File:workginlandingdetail.fcstd]].  


===Rise===


The top of the 2nd story sub-flooring is 121.125" from the top of the sill. We also need to add 1.5" from the basement slab to the sill plus  1/4" for the 2nd story flooring (121.125" + 1.5" + .25" = 122.875" total rise)
File:staires.png|'''Stairs.''' [[File:seh2stairs.fcstd]]. See [https://docs.google.com/presentation/d/1N1lS8RBMy0Y0JnR_h1tz23CYFoR5zespNG4T5m4nnZE/edit#slide=id.gd0d0ba6c1a_0_0] for Stair Design Guide - with stringers.


The actual stairway rise will depend on the height of the landing:
File:seh4landing.png|'''Landing.''' [[File:seh4landing.fcstd]]. SEH 2 version at [[File:Landing.fcstd]]


With 2x6s and 3/4" planks (6.25" total) it will need to be 116.625"
</gallery>
=Build=
How to cut stringer:
*Make a jig - https://www.youtube.com/watch?v=ln8N0ctWLMg. For standardized stairs doable by a novice - can't beat the simplicity.
*Author justs marks for 7 steps


With 2x8s and 3/4" planks (8" total) it will need to be 114.875"
<html><iframe width="560" height="315" src="https://www.youtube.com/embed/ln8N0ctWLMg" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></html>


Simpson version of stringer hanger:


15 steps of 7-3/4" (the maximum allowed by code) is 116.25"
<html><iframe width="560" height="315" src="https://www.youtube.com/embed/XS4NAqsoOyE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></html>


15 steps of 7-5/8" provides 114.375"


More:


The landing or the top step can be adjusted to make up the difference
<html><iframe width="560" height="315" src="https://www.youtube.com/embed/iALK0-n-81c" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe></html>


=BOM=
*Mitek - [https://www.menards.com/main/hardware/fasteners-connectors/construction-hardware/miscellaneous-connectors/mitek-reg-5-x-9-3-4-triple-zinc-concealed-stringer-hanger/csh-tz/p-1444445471577-c-8865.htm]
*Simpson - [https://www.lowes.com/pd/Simpson-Strong-Tie/5013278905?cm_mmc=shp-_-c-_-prd-_-bdm-_-ggl-_-LIA_BDM_103_Roofing-Gutters-_-5013278905-_-local-_-0-_-0&ds_rl=1286981&gclid=CjwKCAjws--ZBhAXEiwAv-RNL-1P3mbgrmpHmuZJzpp9IfvBa0AGI9QQqs-8_vrzvIzYfp6lUZBaChoC-kIQAvD_BwE&gclsrc=aw.ds]
*https://www.menards.com/main/building-materials/lumber-boards/dimensional-lumber/2-x-12-1-southern-yellow-pine-construction-framing-lumber/1022190/p-1444422422543-c-13125.htm


=Prior Art=
*[[Stair Design Guide]]
*[[Seed Eco-Home 2 Stairs]]
*From [[House Design Guide]] - [https://docs.google.com/presentation/d/1N1lS8RBMy0Y0JnR_h1tz23CYFoR5zespNG4T5m4nnZE/edit#slide=id.gd0d0ba6c1a_0_0]
*[[Stair_Design_Guide#Working_Doc]]


===CAD for Stairway with 7 3/4" rise===
=Future Work=
[[File:stairs_detail.fcstd]] - Detailed design file - 7.75" rise
*3D printed stringers make life digital, and could be used as templates.


[[File:stairs_simple.fcstd]] - Simple object for merge
=Links=
 
*[[FreeCAD Stair Designer]].
===CAD for Stairway with a 7 5/8" rise===
*[[House Design Guide]] has general design notes - specifically {{check}} [https://docs.google.com/presentation/d/1N1lS8RBMy0Y0JnR_h1tz23CYFoR5zespNG4T5m4nnZE/edit#slide=id.gd0d0ba6c1a_0_0 here]  
[[File:7_625_stairs_detail.fcstd]] - Detailed design file - 7.625" rise
*[[2021 Stair Design Guide]] - work prior to using regular stringers, which turns out to be easier to build after all.
 
[[File:7_625_stairs_simple.fcstd]] - Simple object for merge
 
[[File:7_625_stairs_example.png|100px]]
 
[[File:7_625_stairs_example.fcstd]] - First floor example
 
===FreeCAD workbench to generate stairs===
[[File:FreeCAD_Stairs_Workbench.zip]]

Latest revision as of 01:03, 10 October 2022

2022 Working Doc

edit

2022 Version

We went from 2-'stringer'-blocking design (of 2021 Stair Design Guide) to regular, 3-stringer design.

Build

How to cut stringer:

Simpson version of stringer hanger:


More:

BOM

Prior Art

Future Work

  • 3D printed stringers make life digital, and could be used as templates.

Links

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