Question

Lightweight concrete blocks ate often used as structural backing for curtain walls that are faced with 1) stainless steel panels 2) stone panels 3) concrete panels or 4) brick veneer

Answer 1

the stainless steel is backed with the beams and columns supporting the building and in this case the light weight concrete cannot be employed. in some cases where the panel span is too high the stainless steel frames are used to support the panels.

the stone panels are always backed by using the stainless steel frames which are more effective in holding the stone panels in position.

concrete panels are also supported by the structural components like beams, columns and slab.

all these are not supported by any form of light weight concrete as they are held in position different types of backing as explained above.

the only panels of curtain wall which are provided structural backing by light weight concrete is brick veneer. as these concist of individual units which require structural stability for entire span.

Therefore,the light weight concrete blocks are often used as structural backing for curtain walls only when they are faced with brick veneer.

option 4) brick veneer is correct option.