Roof Snow Load
NBC 2005
v1.0.0
File:
Project:
Designer:
Date:

Climatic Data

Location
Province:
Ground snow load
Ss:
Rain Load
Sr:
Importance factor
Is:
Factors
Cb:
Cw:
Ca:
Roof Geometry
Pitch:
/12
Slippery:
Thinking...

Specified Snow Load

S = Is[Ss(CbCwCsCa)+Sr] [4.1.6.2]

Factors

User input values:
Ss = 1 / Sr = 1
Importance Factor, ULS: Is = 1.0 / SLS: Is = 0.9
Roof slope = 0 degrees
Slope Factor
For non-slippery roof:
Slope <= 30 degrees.
Cs = 1

ULS:

S = 1.0[1(0.8*1.0*1*1.0)+1] = 1.8kPa

S = 1.8 kPa

S = 37.6 psf


SLS:

S = 0.9[1(0.8*1.0*1*1.0)+1] = 1.62kPa

S = 1.62 kPa

S = 33.8 psf

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