Snow Drift Loading
Lower Adjacent Roofs (NBC2015)
v1.0.1
File:
Project:
Designer:
Date:

Climatic Data

Location
Province:
Ground snow load
Ss:
Rain Load
Sr:
Density
Snow density, γ:
kN/m3 *If left blank, γ will calc as per cl. 4.1.6.13

Factors

Importance factor
Is:
Factors
Cw:
snow drift distribution

Upper Roof geometry

Roof Plan dimensions
Longer dimension, l:
m
Shorter dimension, w:
m
Height of parapet, hp:
m
snow drift distribution

Lower Roof geometry:

Roof step, h:
m
Pitch:
/12
Slippery:
Roof Parapet:
* If "Yes" selected, Cs = 1.0.

Case 2: Source Area Dimensions
Longer dimension,l:
m
Shorter dimension,w:
m
Parapet Height,hp:
m * Leave 0 unless parapet along entire roof edge of source area.
Case 3: Source Area Dimensions
Longer dimension,l:
m
Shorter dimension,w:
m
Parapet Height,hp:
m * Leave 0 unless parapet along entire roof edge of source area.
Thinking...

This information must be read or used in conjunction with Part 4 of the NBC 2015. In the event of discrepancies, Part 4 of the NBC 2015 shall govern.

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