Ice Loads

Ice and Rain loads are applied to all above ground pipe elements and fittings in vertical direction downward. To remove ice loads on some elements, set to zero the ice shape factor.

Available following codes for ice loads:

Dk – Insulation Outer Diameter (specified in pipe properties)

c - Ice Shape Factor (specified in pipe properties)

- Ice load in unit weight (0.9 tf/m3)

fz - height factor

Same as ASCE 7-16

Dk – Insulation Outer Diameter (specified in pipe properties)

c - Ice Shape Factor (specified in pipe properties)

- Ice load in unit weight (0.9 tf/m3)

Dk – Insulation Outer Diameter (specified in pipe properties)

c - Ice Shape Factor (specified in pipe properties)

- Ice load in unit weight (0.9 tf/m3)

Property

Description

Insulation Outer Diameter

Insulation outer diameter is used for calculation of ice layer area

Elevation of Start/End Node

Greatest elevation is used for calculation of ice load

Ice Region

Select ice region number from SP 20.13330.2016 maps

Load Type

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

Basic Ice Thickness

  • ASCE 7-16 (USA): t - Nominal ice thickness due to freezing rain at 33ft (10m)

  • IBC 2012 (International): t - Nominal ice thickness due to freezing rain at 33ft (10m)

  • GB 50135-2006 (China): b - Basic ice thickness

Wind Exposure

  • ASCE 7-16 (USA): B, C, D

  • IBC 2012 (International): Same as ASCE 7-16

Importance Factor

  • ASCE 7-16 (USA)

 

  • IBC 2012 (International): Same as ASCE 7-16

Hill Shape

  • ASCE 7-16 (USA)

  • IBC 2012 (International): Same as ASCE 7-16

Height of Hill, H

  • ASCE 7-16 (USA): H - height of hill or escarpment

  • IBC 2012 (International): H - height of hill or escarpment

Crest Distance, Lh

  • ASCE 7-16 (USA): Lh - distance upwind of crest of hill or escarpment to where the difference in ground elevation is half the height of the hill or escarpment

  • IBC 2012 (International): Same as ASCE 7-16

Distance from Crest to Site, x

  • ASCE 7-16 (USA): x - distance upwind or downwind of crest (+ upwind, - downwind)

  • IBC 2012 (International): Same as ASCE 7-16

Menu Access

Dialog window opens automatically when creating a new analysis file or opening an existing analysis file. To open this window in an open file, use  File > Project Settings