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A: Tap in 2 (TN2) 5/16” T-nuts in each (9088) Tunnel Side Joist. (g. 10.1)
B: With the (TN2) 5/16” T-nuts at the bottom measure 1” in from both ends of each (9088) Tunnel Side Joist then
attach 1 (9086) Tunnel Top to each end with 4 (S4) #8 x 3” Wood Screws per board. Tops of boards to be ush.
(g. 10.1)
C: The distance diagonally from end of each (9088) Tunnel Side Joist must be 39-13/16”. Tunnel Floor Frame
must be square. (g. 10.2)
Step 10: Tunnel Floor Assembly
Part 1
4 x 5/16” T-nut
8 x #8 x 3” Wood Screw
2 x Tunnel Side Joist 1-1/4 x 3 x 36”
2 x Tunnel Top 1-1/4 x 3 x 14-7/16”
9088
Wood Parts
9086
TN2
S4
Hardware
S4
S4
1”
x 4
x 4
9088
9088
9086
9086
Flush
TN2
x 4
Fig. 10.1
Fig. 10.2
1010.5
39 25/32"
1010.5
39 25/32"
Top View
39-13/16”