Each column is investigated for all the skip load live load conditions indicated previously for each of the following Load Combinations:

AISC 360 ASD

• 1.0DL
• 1.0DL + 1.0LL
• 1.0DL + 1.0LL roof
• 1.0DL + 0.75LL + 0.75LL roof

AISC 360 LRFD

• 1.4 DL
• 1.2 DL + 1.6 LL + 0.5 LL roof
• 1.2 DL + 0.5 LL + 1.6 LL roof

ASD 9th

• 1.0 DL
• 1.0 DL + 1.0 LL + 1.0 LL roof

LRFD 3rd

• 1.4 DL
• 1.2 DL + 1.6 LL + 0.5 LL roof
• 1.2 DL + 0.5 LL + 1.6 LL roof

CAN/CSA S16

• 1.4 DL
• 1.25 DL + 1.5 LL + 0.5 LL roof
• 1.25 DL + 0.5 LL + 1.5 LL roof
• 0.9 DL + 1.5 LL + 0.5 LL roof
• 0.9 DL + 0.5 LL + 1.5 LL roof

Based on the Importance category, NBC of Canada may allow Live, Roof, and Snow loads to be reduced or may require that the Snow loads be increased. The program does not apply these factors. The loads should be input with the factors applied as appropriate.

BS 5950

• 1.4 DL
• 1.4 DL + 1.6 LL + 1.6 LL roof
• 1.0 DL + 1.6 LL + 1.6 LL roof

Eurocode

All symbols indicated in this section are set by the engineer from the Eurocode Factors dialog in RAM Manager.

${\gamma }_{\text{Gj,sup}}DL$

${\gamma }_{\text{Gj,sup}}DL+{\psi }_{\text{0,imposed}}{\gamma }_{\text{Q,1}}LL+{\psi }_{\text{0,roof}}{\gamma }_{\text{Q,i}}{LL}_{roof}$

${\gamma }_{\text{Gj,sup}}DL+{\psi }_{\text{0,imposed}}{\gamma }_{\text{Q,i}}LL+{\psi }_{\text{0,roof}}{\gamma }_{\text{Q,1}}{LL}_{roof}$

$\xi {\gamma }_{\text{Gj,sup}}DL+{\gamma }_{\text{Q,1}}LL+{\psi }_{\text{0,roof}}{\gamma }_{\text{Q,i}}{LL}_{roof}$

$\xi {\gamma }_{\text{Gj,sup}}DL+{\psi }_{\text{0,imposed}}{\gamma }_{\text{Q,i}}LL+{\psi }_{\text{0,roof}}{\gamma }_{\text{Q,1}}{LL}_{roof}$

${\gamma }_{\text{Gj,inf}}DL+{\gamma }_{\text{Q,1}}LL+{\psi }_{\text{0,roof}}{\gamma }_{\text{Q,i}}{LL}_{roof}$

${\gamma }_{\text{Gj,inf}}DL+{\psi }_{\text{0,imposed}}{\gamma }_{\text{Q,}1}LL+{\gamma }_{\text{Q,1}}{LL}_{roof}$

Note: When Snow load is specified rather than Roof Live Load, LLsnow and ψ_0,snow are used in the above equations in place of LLroof and ψ_0,roof, respectively.

AS 4100 and AS/NZS 1170

Load combination template files were generated based on AS/NZS 1170.0:2002, Section 4.2 Combinations of Actions for Ultimate Limit States. Section 4.2.2 Strength

The combinations included in RAM Steel Column are:

• (a) [1.35G]
• (b) [1.2G, 1.5Q]
• (c) [1.2G, Su, ψ_cQ]

where

G	=	the Dead Load ("permanent action")
Q	=	the Live Load ("imposed action")
Su	=	the Snow Load (per Section 4.2.3(a))
ψc	=	the "combination factor for imposed action" and user can provide in the RAM Manager Australia Criteria dialog

The combinations are expanded as follows:

• 1.35DL
• 1.2DL + 1.5 LL
• 1.2DL + 1.5 LL + 1.5 LL roof
• 1.2DL + ψ_c LL + 1.5 LL snow

ψ_c is specified by the user in the RAM Manager Australia Criteria dialog (Available if AS/NZS 1170 is selected as the Live Load Reduction code in the RAM Manager Critera > Member Loads dialog).

IS 800-07 WSD

• 1.0 DL
• 1.0 DL + 1.0 LL + 1.0 LL roof

IS 800-07 LSD

• 1.5 DL
• 1.5 DL + 1.5 LL + 1.5 LL roof