Snow Loads

Snow loads apply vertically downward to all above-ground pipe elements and fittings. The load magnitude depends on each pipe element's slope angle. Set the snow shape factor to zero to exclude snow loads from specific elements.

Supported snow load design codes:

ASCE 7-22 (USA)

C_a - Snow Shape Factor (specified in pipe properties)

D_k – Insulation Outer Diameter (specified in pipe properties)

C_t - Thermal Coefficient (specified in pipe properties)

C_s - Slope Factor

IBC 2021 (International)

Same as ASCE 7-22

KBC 2016 (Korea)

C_a - Snow Shape Factor (specified in pipe properties)

D_k – Insulation Outer Diameter (specified in pipe properties)

C_t - Thermal Coefficient (specified in pipe properties)

C_s - Slope Factor

EN 1991-1-3:2003+A1:2015 (European Union)

- snow shape factor (specified in pipe properties)

D_k – Insulation outer diameter (specified in pipe properties)

C_t - Thermal Coefficient (specified in pipe properties)

C_e - Exposure Coefficient (Windswept 0.8, Normal 1.0, Sheltered 1.2)

- Slope Factor

TKP EN 1991-1-3:2003+A1:2015 (Belarus)

Same as EN 1991-1-3:2003+A1:2015

GB 50009-2012 (China)

- snow shape factor (specified in pipe properties)

D_k – Insulation outer diameter (specified in pipe properties)

- slope factor

SP 20.13330.2016 (Russia)

- snow shape factor (specified in pipe properties)

D_k – Insulation outer diameter (specified in pipe properties)

NBC 2020 (Canada)

C_a - snow shape factor (specified in pipe properties)

D_k – Insulation outer diameter (specified in pipe properties)

C_b = 0.8

C_w = 1

C_s - slope factor

Property	Description
Insulation Outer Diameter	Determines snow distribution area for load calculation
Snow Region	Select snow region number from SP 20.13330.2016 maps
Load Type	SUS - sustained snow load, OCC - occasional snow load
Ground Snow Load	ASCE 7-22 (USA): p_g - ground snow load IBC 2021: p_g - ground snow load EN 1991-1-3:2003+A1:2015 (European Union): s_k - characteristic snow load on ground TKP EN 1991-1-3:2003+A1:2015 (Belarus): s_k - characteristic snow load on ground GB 50009-2012 (China): S_g - ground snow load base value NBC 2020 (Canada): S_s - 1-in-50 year ground snow load KBC 2016 (Korea): S_g - ground snow load
Rain Load	NBC 2020 (Canada): S_r - 1-in-50 year associated rain load
Exposure Factor, C_e	ASCE 7-22 (USA): C_e - Exposure factor IBC 2021: Same as ASCE 7-22 KBC 2012: C_e - Exposure factor Surrounding environment classification: A. Fully exposed roofs in windy areas: 0.8 B. Partially sheltered roofs: 0.9 C. Normal exposure conditions: 1.0 D. Sheltered roofs: 1.1 E. Dense forest areas: 1.2
Importance Factor	NBC 2020 (Canada): I_s - importance factor for snow load KBC 2012: I_s - importance factor for snow load
μ₁(0)	EN 1991-1-3:2003+A1:2015 (European Union): μ₁(0) TKP EN 1991-1-3:2003+A1:2015 (Belarus): μ₁(0)
Exposure	EN 1991-1-3:2003+A1:2015 (European Union): C_e factor TKP EN 1991-1-3:2003+A1:2015 (Belarus): C_e factor

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