Summary of load combination types

The effects of using different load combination types and analysis types are summarized in the following table.

Table 1. Load Combination Summary
	Linear	Zero-tension
Single	Standard and Alternate load factors for every loading No zero-tension iterations Considers pattern loading	Standard load factor for every loading Zero-tension iterations as necessary Ignores pattern loading Ignores "Don’t Reduce Integrated M and V Due to Sign Change" option
Group	Standard and Alternate load factors for every non-lateral loading Standard and Alternate load factors for the selected lateral loading type No zero-tension iterations Considers pattern loading No results for point springs, line springs, point supports, line supports, walls. No "Standard" results for any quantity See the second figure in this chapter for more information.	Standard load factor for every non-lateral loading Standard load factor for the selected lateral loading type Zero-tension iterations as necessary Ignores pattern loading No results for point springs, line springs, point supports, line supports, walls. No "Standard" results for any quantity Ignores "Don’t Reduce Integrated M and V Due to Sign Change" option See the second figure in this chapter for more information.

ACI 318-05 Elevated floor file with lateral loadings added

To simplify the example, four loadings have been deleted from the standard file.

After adding and deleting some loadings, the load combinations have been rebuilt. See "Rebuilding load combinations".

The Rebuild operation adds the load combination "Factored Wind LC: 1.2D + f₁L+ 0.5Lr + 1.6W", as shown in the following figure.

RAM Concept now expands this load combination and calculates the following load combinations:

1.2 Self-dead + 1.0 Hyperstatic + 1.2 Other dead + 0.5 Live (reducible) + 1.6 North Wind + 1.6 North Wind (transfer)
1.2 Self-dead + 1.0 Hyperstatic + 1.2 Other dead + 0.5 Live (reducible) - 1.6 North Wind - 1.6 North Wind (transfer)
1.2 Self-dead + 1.0 Hyperstatic + 1.2 Other dead + 0.5 Live (reducible) + 1.6 East Wind
1.2 Self-dead + 1.0 Hyperstatic + 1.2 Other dead + 0.5 Live (reducible) - 1.6 East Wind
1.2 Self-dead + 1.0 Hyperstatic + 1.2 Other dead + 0.5 Live (reducible) + 1.6 Trade Wind + 1.6 Sirocco Wind + 1.6 Zephyr Wind
1.2 Self-dead + 1.0 Hyperstatic + 1.2 Other dead + 0.5 Live (reducible) - 1.6 Trade Wind - 1.6 Sirocco Wind - 1.6 Zephyr Wind