Doubled cold formed profile

[legar]

During multi span purlin (girt) design of cold formed sections (Z, C, Sigma) in practice we use overlap (doubled) section over supports.

It will be very useful to have a possibility to declare dobled section which all properties will be a sum of properties of both sections, eg.:

Ix = Ix1 + Ix2

Iy = Iy1 + Iy2

Ax = Ax1 + Ax2

and so on...

Of course both profies should be from the same profiles family with the only difference in profiles thickness eg.:

C300x1.5 + C300x2.5; Z250x2.0 + Z250x2.5 and so on...

[legar]

Of course possible should be 2 same profiles :):

2xC300x2.5; 2xZ250x1.8 and so on...

Some examples:

1. Purlin doubled over roof rafter:

2.Girt doubled over frame column:

[philip.s]

prior status deleted, setting to default