kPa where the top line of the result (42kPa) is for Combination 1 and the bottom line (30kPa) for Combination 2. Partial factors are introduced into the calculations as follows:

where 1.0 is the value of yc Combination 2.

in Combination 1 and 1.4 its value in

The arrow across the top of an equation (see example above) is standard mathematical notation for a matrix cross-product, thereby expanding the previous equation to:

0 0

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