Stair Design Guide: Difference between revisions

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[[File:stairs_example.png|100px]]
[[File:stairs_example.png|100px]]


===Step Size===


The top of the 2nd story sub-flooring is 121.125" from the top of the sill. We then need to add 1.5" from the basement slab to the sill plus another 1/4" for the flooring, making the total rise from the slab to the top of the flooring 122.875"  
The steps are 42.125" wide and 11.25" deep with a 1.125" nosing


The actual stairway rise will depend on the height of the stair landing:
===Rise===


If made with 2x6s plus 3/4" planks it will be 6.25", making the needed rise 116.625"
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)


If made with 2x8s plus 3/4" planks it will be 8", making the needed rise 114.875
The actual stairway rise will depend on the height of the landing:
 
With 2x6s and 3/4" planks (6.25" total) it will need to be 116.625"
 
With 2x8s and 3/4" planks (8" total) it will need to be 114.875"




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The landing or the top step can be adjusted to make up the difference


Steps are 42.125" wide, 11.25" deep




===Stairs with 7 3/4" rise===
===CAD for Stairway with 7 3/4" rise===
[[File:stairs_detail.fcstd]] - Detailed design file - 7.75" rise
[[File:stairs_detail.fcstd]] - Detailed design file - 7.75" rise


[[File:stairs_simple.fcstd]] - Simple object for merge
[[File:stairs_simple.fcstd]] - Simple object for merge


===Stairs with a 7 5/8" rise===
===CAD for Stairway with a 7 5/8" rise===
[[File:7_625_stairs_detail.fcstd]] - Detailed design file - 7.625" rise
[[File:7_625_stairs_detail.fcstd]] - Detailed design file - 7.625" rise


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[[File:7_625_stairs_example.fcstd]] - First floor example
[[File:7_625_stairs_example.fcstd]] - First floor example
===FreeCAD workbench to generate stairs===
[[File:FreeCAD_Stairs_Workbench.zip]]

Revision as of 23:53, 18 September 2021

Original design - File:Stairs.fcstd


Stairway for SeedHome v2

Error creating thumbnail: File missing
Error creating thumbnail: File missing
Error creating thumbnail: File missing

Step Size

The steps are 42.125" wide and 11.25" deep with a 1.125" nosing

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)

The actual stairway rise will depend on the height of the landing:

With 2x6s and 3/4" planks (6.25" total) it will need to be 116.625"

With 2x8s and 3/4" planks (8" total) it will need to be 114.875"


15 steps of 7-3/4" (the maximum allowed by code) is 116.25"

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


The landing or the top step can be adjusted to make up the difference


CAD for Stairway with 7 3/4" rise

File:Stairs detail.fcstd - Detailed design file - 7.75" rise

File:Stairs simple.fcstd - Simple object for merge

CAD for Stairway with a 7 5/8" rise

File:7 625 stairs detail.fcstd - Detailed design file - 7.625" rise

File:7 625 stairs simple.fcstd - Simple object for merge

Error creating thumbnail: File missing

File:7 625 stairs example.fcstd - First floor example

FreeCAD workbench to generate stairs

File:FreeCAD Stairs Workbench.zip