USG Domed Ceilings and Barrel Vaults - Manual (Page 10)

Page 10 of 12
Step 3 Install main tee ribs The construction specifications indicate the total arc length required for each main-tee rib (dimension G).
Begin constructing each rib by hanging a main tee at the apex. Hang the main tee so that a cross-tee slot
is at the apex
(Figure 16) . Work outward at both ends, connecting curved tees as needed using splice plates
provided (Figure 17) . Grid face elevations (measured from perimeter) are shown in Table 2.1 of the Construction
Specifications to aid leveling of ribs (dimension H). If the barrel vault terminates into a wall, the perimeter
hanger wire may be omitted. Instead, tie back or mechanically fasten the main-tee perimeter as required.
Figure 16 – Hang main tees
Figure 17 – Join curved tees
Step 4 Install cross tees Install cross tees to connect main-tee ribs (Figure 18) . Use spacing as indicated on the Construction
Specifications.
Figure 18 – Cross-tee installation
apex
apex
H
G
cross tees
cross-tee
spacing as
specified
Part 2:
Installation
Instructions
Barrel Vaults
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