Ice Loads

Ice and rain loads apply downward vertical forces to all above-ground pipe elements and fittings. Set ice shape factor to zero to exclude specific elements from ice load calculations.

Supported ice load standards:

Dk – Insulation outer diameter (defined in pipe properties)

c - Ice shape factor (defined in pipe properties)

- Ice load unit weight (0.9 tf/m³)

fz - Height factor

Same as ASCE 7-22

Dk – Insulation outer diameter (defined in pipe properties)

c - Ice shape factor (defined in pipe properties)

- Ice load unit weight (0.9 tf/m³)

Dk – Insulation outer diameter (defined in pipe properties)

c - Ice shape factor (defined in pipe properties)

- Ice load unit weight (0.9 tf/m³)

Property

Description

Insulation Outer Diameter

Determines ice layer cross-sectional area for load calculation

Elevation of Start/End Node

Highest elevation value used for ice load calculation. Default elevation above ground surface calculates automatically assuming horizontal ground plane. Disable "Recalculation of elevation above ground surface" for pipelines on variable terrain.

Ice Region

Select ice region number from SP 20.13330.2016 maps

Load Type

SUS - sustained ice load, OCC - occasional ice load

Basic Ice Thickness

  • ASCE 7-22 (USA): t - Nominal ice thickness from freezing rain at 33 ft (10 m)

  • IBC 2021 (International): t - Nominal ice thickness from freezing rain at 33 ft (10 m)

  • GB 50135-2019 (China): b - Basic ice thickness

Wind Exposure

  • ASCE 7-22 (USA): B, C, D

  • IBC 2021 (International): Same as ASCE 7-22

Hill Shape

  • ASCE 7-22 (USA)

  • IBC 2021 (International): Same as ASCE 7-22

Height of Hill, H

  • ASCE 7-22 (USA): H - Hill or escarpment height

  • IBC 2021 (International): H - Hill or escarpment height

Crest Distance, Lh

  • ASCE 7-22 (USA): Lh - Upwind distance from crest to point where elevation difference equals half the hill height

  • IBC 2021 (International): Same as ASCE 7-22

Distance from Crest to Site, x

  • ASCE 7-22 (USA): x - Distance upwind or downwind from crest (+ upwind, - downwind)

  • IBC 2021 (International): Same as ASCE 7-22

Menu Access

Dialog opens automatically during new file creation or existing file opening. Access manually via File > Project Settings