The depth of the structural box that gives the curtain walling its strength is determined by the size of the screen and the site location, but the typical sightlines when looking through or at the glazed screen are only 50 mm.
The box depth is location and design specific. Providing architects’ drawings and the postcode allows us to check the wind load (pa) ratings of the area, which in turn tells us the IXX value requirements.
This information then dictates the depth of the box required for structural strength. The boxes range from 100 mm – 230 mm. Mid-point steels that allow us to tie back to also have a dramatic effect on reducing the box depth, so you may want to consider working these into your build if you’re looking for a slimmer finish internally.