Complex sentence: Owing to a lesser economy of materials and difficult design before the advent of computers, this truss is rarely used in a bridge outside Belgium, although common in some building structures where large shear walls or diagonal elements would interfere with the desired design statement or functionality.
Split into simpler sentences: Owing to a lesser economy of materials and the difficulty of design before the advent of computers, this truss is rarely used in bridges outside Belgium. The form is more commonly employed in building structures where large shear walls or diagonal elements would interfere with the building's aesthetics or functionality.