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 the load combination template are:

1. [1.35G]
2. [1.2G, 1.5Q]
3. [1.2G, 1.5ψ₁Q]
4. [1.2G, W_u, ψ_cQ]
5. [0.9G, W_u]
6. [G, E_u, ψ_cQ]
7. [1.2G, S_u, ψ_cQ]

where

G	=	the Dead Load ("permanent action")
Q	=	the Live Load ("imposed action")
Wu	=	the Wind Load
Eu	=	the Earthquake Load
Su	=	the Snow Load (per Section 4.2.3(a))
ψc	=	the "combination factor for imposed action" and user can provide in the generator dialog box
ψ1	=	the "factor for determining quasi-permanent values (long term) of actions"

ψ_c and ψ_l are given in Table 4.1.

The program does not explicitly distinguish long-term imposed loads from other imposed loads, so the combinations of Combination (c) will not be generated, as they would always result in combinations with smaller factors than the corresponding combinations of Combination (b). Notably, the values listed in Table 4.1 for Storage loads are different from those listed for, say, Office and Residential loads. However, since all of the different types of Live Loads are analyzed and combined prior to the application of load combinations, the program will not be able to apply a different ψ_c value to different Live Loads; the user will specify the value of ψ_c and the program will apply that to all of the Live Load in the appropriate combinations.

The combinations are expanded as follows:

• (a) 1.35DL + 1.35ND
• (b) 1.2DL + 1.2 ND + 1.5LL + 1.5NL
• (b) 1.2DL + 1.2 ND + 1.5LLRoof + 1.5NR
• (b)1.2DL + 1.2 ND + 1.5sLL + 1.5NL + 1.5LLRoof+ 1.5NR
• (d) 1.2DL + Psic * LL ± W
• (d) 1.2DL ± W
• (e) 0.9DL ± W
• (f) DL + Psic * LL ± E
• (f) DL ± E
• (g) DL ± E

Psic is ψ_c specified by the user. The program pattern loads ("skip loads") the Live Load; PosLL is the member forces resulting from the loading patterns that create the normal downward acting load conditions, while NegLL is the member forces resulting from the loading patterns that create uplift. Likewise for PosSnow and NegSnow.

The generated load combinations can be viewed using the Reports – Load Combinations command.