Kbird1

VERTICAL STRUCTURE DEPTH (VSD) RAFTER TABLE PDF

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The Attachment at the Bottom is a PDF of the Vertical Structure Depths for Common Imperial Lumber sizes and LVL / TJI sizes at different Roof Pitches

which I made recently with Forum Member "Chopsaw's" help  ( Thanks - 'cos Trig. ain't my thing ! ). 

 

( VSD is VRD in older versions of Chief )

 

VSD as defined in the Reference Manual :

 The Vertical Structure Depth is defined by measuring a plumb line across the roof plane structure. The degree of pitch affects the Vertical rafter width.

The greater the pitch, the greater the vertical structure depth. ( *** See 3rd pic below or the 3rd page of the PDF for Clarification )

 

Below are also some pics of the 3 Page PDF for Reference :

 

image.thumb.png.2e9083cbaf82fab568d85e0c823644d7.pngimage.thumb.png.d34df581037876aac10d873f7af49820.png  

 

image.thumb.png.acfe68052b3fdb5500fb236c9af24c74.png                         

 

 

PDF FILE :  CHIEF ARCH. VERTICAL STRUCTURE DEPTH (VSD) CHART FOR IMPERIAL LUMBER SIZES.pdf

 

 

Mick.

 

 

 

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How will this chart help me? That is, what problem does it solve?

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It doesn't solve any problem perse , it is simply a Cheat Sheet for VSD sizes , inspired by a hand written Cheat Sheet posted by Curt  (  @CJSpud  ) a few years ago in a Thread about Energy Heel Trusses , which I just expanded on, now I have some (minor) Excel skills.

 

M.

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