USG Domed Ceilings and Barrel Vaults - Manual (Page 2)

Page 2 of 12
Part 1:
Installation
Instructions
Domes
Step 1 Gather construction Dome construction specifications are prepared specifically for each dome, 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 .
These specifications include important tables, diagrams, and dimensions that you will need to install a dome
successfully. For additional help, contact your USG representative.
Step 2 Install the To install the dome hub, identify the correct location and elevation for the center or apex of the dome. Hang
dome hub the dome hub.
Tip: Form a “pail handle” between two opposite hanger holes so that the hub can be hung from a single wire
(Figure 1) .
Tip: Hub detail provides connection points compatible with USG C
urvatura ™ splice plates, access point for plumb
bob, tape measure slots to aid in arc measurements, and a knockout for a standard electrical box, if needed.
Figure 1- Dome hub
Step 3 Position and install Curved grid is supplied with sets of punched holes spaced 8 apart (Figure 2) along the tee. The two round
hanger wires holes are intended 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
(Figure 3) . See Table 1.1 of the
Construction Specifications for exact hanger locations (dimension B).
Figure 2 – Pre-punched grid Figure 3 – Hanger wire spacing
curved
primary
spoke
dome hub
hanger wires
electrical box
knockout
center hole for plumb bob
tape measure slots
main-tee splice plate
12-ga. hanger wire
hanger wire holes
cross-tee slot
hanger wire spacing
varies with slope of curve
hub
B
W1 W2 W W4 W
E
Technical Service 800 USG.4YOU
Samples, Literature 888 874.2450
Customer Service 800 950.3839
usg.com