Snow Loads

Snow loads are applied to all above ground pipe elements and fittings in vertical direction downward. The load depends on slope angle of each pipe element. To remove snow loads on some elements, set to zero the snow shape factor.

 

Available following codes for snow loads:

Ca - Snow Shape Factor (specified in pipe properties)

Dk – Insulation Outer Diameter (specified in pipe properties)

Ct - Thermal Coefficient (specified in pipe properties)

Cs - Slope Factor

Same as ASCE 7-16

Ca - Snow Shape Factor (specified in pipe properties)

Dk – Insulation Outer Diameter (specified in pipe properties)

Ct - Thermal Coefficient (specified in pipe properties)

Cs - Slope Factor

 

- snow shape factor (specified in pipe properties)

Dk – Insulation outer diameter (specified in pipe properties)

Ct - Thermal Coefficient (specified in pipe properties)

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

- Slope Factor

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

- snow shape factor (specified in pipe properties)

Dk – Insulation outer diameter (specified in pipe properties)

- slope factor

- snow shape factor (specified in pipe properties)

Dk – Insulation outer diameter (specified in pipe properties)

Ca - snow shape factor (specified in pipe properties)

Dk – Insulation outer diameter (specified in pipe properties)

Cb=0.8

Cw=1

Cs - slope factor

Property

Description

Insulation Outer Diameter

Insulation outer diameter is used for calculation of snow distribution area

Snow Region

Select snow region number from SP 20.13330.2016 maps

Load Type

SUS - if snow load assumed as sustained, OCC - if snow load is assumed as occasional

Ground Snow Load

  • ASCE 7-16 (USA): pg - ground snow load

  • IBC 2012: pg - ground snow load

  • EN 1991-1-3:2003+A1:2015 (European Union): sk - The characteristic value of snow load on the ground (sk) should bedetermined inaccordance with EN 1990:2002,4.1.2(7)Pand the definition for characteristic snow load on the ground given in 1.6.1

  • TKP EN 1991-1-3:2003+A1:2015 (Belarus): sk - The characteristic value of snow load on the ground (sk) should bedetermined inaccordance with EN 1990:2002,4.1.2(7)Pand the definition for characteristic snow load on the ground given in 1.6.1

  • GB 50009-2012 (China): Sg - ground snow load base value

  • NBC 2010 (Canada): Ss - 1-in-50 year ground snow load

  • KBC 2016 (Korea): Sg - ground snow load

Rain Load

  • NBC 2010 (Canada): Sr - 1-in-50 year associated rain load

Exposure Factor, Ce

  • ASCE 7-16 (USA): Ce - Exposure factor

  • IBC 2012: Same as ASCE 7-16

  • KBC 2012: Ce - Exposure factor

Surrounding environment

A. Strong windy areas with roofs exposed to all sides without windshields by surrounding environment such as terrain, tall structures, trees, etc. 0.8

B. Strong windy areas with a slight windshield 0.9

C. Removal of snow by wind is a location where the roof load can’t be expected to decrease due to terrain, high structures or some trees nearby. 1.0

D. Areas with low wind impacts and areas with roof tops and windshields due to topography and high structures or some trees 1.1.

E. A dense forest area with little wind impact, with roof 1.2 located between dense conifers

Importance Factor

  • ASCE 7-16 (USA): Is - importance factor for snow load

 

  • IBC 2012: Same as ASCE 7-16

  • NBC 2010 (Canada): Is - importance factor for snow load

  • KBC 2012: Is - importance factor for snow load

 

mu1(0)

  • EN 1991-1-3:2003+A1:2015 (European Union): mu1(0)

  • TKP EN 1991-1-3:2003+A1:2015 (Belarus): mu1(0)

Exposure

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

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

Menu Access

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