Question

lightweight concrete blocks ate often used as structural back g for curtain walls that are faced with ----------.

Answer 1

Light weight concrete blocks are often used as structural backing for curtain wall that are faces with rough surfaces

Curtain walls are outer cover of building

Curtain walls are non structural, they keep weather out and occupants in

For architectural purpose, curtain walls are to be plastered and painted

For plasting surface needs to be rough, so for curtain walls roughly faced light weight concrete blocks were used often