USG Domed Ceilings and Barrel Vaults - Manual (Page 9)

Page of 12
Part 2:
Installation
Instructions
Barrel Vaults
Step 1 Gather construction Vault construction specifications are prepared specifically for each vault and may be provided by the architect,
specifications your USG representative, or you can generate a set on line at www.usg.com > Resources > Online Tools . The
construction specifications include important tables, diagrams and dimensions that you will need to complete
the vault successfully. For additional help, contact your USG representative.
Step 2 Install hanger wires Curved main tees are supplied with sets of punched holes (Figure 14) spaced 8 apart along the tee. The round
holes are for hangers. Each hanger wire needs to fall in line with a pre-punched hanger hole; because the
spokes are curved, the horizontal distance between hanger wires will vary along the rib
(Figure 15) . See Table
2.1 of the Construction Specifications for hanger locations. The distances shown (dimension F) are the distance
along the floor and are measured from the apex of the vault. Hanger wires should be installed symmetrically on
either side of the apex.
Figure 14 – Pre-punched grid Figure 15 – Hanger wire spacing
Tip: It may be easiest to mark hanger locations on the floor and then use a laser to project these points
to the ceiling.
Tip: Extra hanger holes are provided to help work around obstructions; however, the space between any two
hanger wires must not exceed the specified maximum indicated on the construction specifications.
Refer to the construction specifications to determine spacing of main-tee ribs. Using Table 2.1 of the Construction
Specifications as a guide, install additional rows of hangers for each main-tee rib.
12-ga. hanger wire
hanger wire holes
cross-tee slot
hanger wire spacing varies
with slope of curve
apex
F
W7 W W W1 W2 W4 W6
H
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Samples, Literature 888 874.2450
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