Tubelite’s 400SS Series Screw Spine Curtainwall thermally broken curtainwall product has been designed to reduce fabrication and installation labor while meeting or exceeding today’s stringent energy codes. The 400SS has a 2-1/2″ sight line with system depths from 6” to 10”. This screw spline system can be pre-assembled, pre-sealed (i.e. water dams) and pre-glazed in the shop, or stick fabricated for field glazing.