Chief Manufacturing CMS390 Installation, Drill two 1/8 pilot holes into wood joists

CMS390/CMS391 Installation Instructions

INSTALLATION

NOTE: The CMS390 and CMS391 ceiling plates attach to a 1-1/2" NPT threaded column in a finished ceiling with 16" on-center (CMS390) or 24" on-center (CMS391) wood joists. In addition, both the CMS390 and CMS391 can be installed in line on a single joist.

1.Remove end caps from ceiling plate (A). (See Figure 1)

(A)

End caps

Figure 1

2.Drill two 1/8" pilot holes into wood joists.

3.Install ceiling plate (A) to ceiling using two 1/4-20 x 3-1/2" lag bolts (B) and two 1/4" flat washers (C). (See Figure 2)

4.Re-install end caps onto ceiling plate (A). (See Figure 2)

(A)
	4
4
(C) x 2
3	((B) x 2

Figure 2

5.Install 1-1/2" NPT threaded column (not included) into threaded collar on ceiling plate (A).

6.Install one 10-24 x 1/4" Phillips head screw (D) into threaded collar and tighten. (See Figure 3)

		(column not shown)
6	(D) x 1(F
	1	2	3
			x 2

Figure 3

Adjust Ceiling Plate Position

1.Loosen adjustment set screws. (See Figure 3)

2.Adjust plate to position.

3.Tighten screws loosened in Step 1.

6