In a stick-built glass curtain wall system, the mullions may span floor to floor (called single-span mullion system) or between two floors (called twin-span mullion system). In the single -span mullion system, each mullion must be anchored to the building's structural frame with two supports, one at each end. What are these supports (anchors) called? Which of these two anchors (supports) is
designed to: (i) carry the gravity load of the curtain wall, (ii) accommodate movement in the curtain wall, and (iii) resist the lateral (wind and seismic) load on the curtain wall?
What will be an ideal response?
Two types of supports: dead load anchor support and tieback anchor support.
(i) The dead load support carries the gravity load of the wall. (ii) The tieback anchor support accommodates
movement in the curtain wall, hence called expansion anchor support. (iii) Both dead load anchor support and
tieback resist lateral loads on the wall.
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