When creating a glazed wall, curtain walling is one solution (with prefabricated sections hung in place) or, alternatively, the glass itself can be hung from a frame. Using trusses to span a wall or building height, often along with diagonal bracing, the structure must be strong in tension but able to flex if struck by [...]
Advantages
Very strong in tension
Considerable compressive strength although box section is strongest
Tension and compression act on only top and bottom of ‘I’ section so holes can be drilled through to reduce weight and provide utility access
Speed of erection
Disadvantages
Time to site – slow
Cost
Loss of strength in fire although it can be protected by intumescent paint or foam
Corrosion
Skilled [...]
