Figure 3.4.3 Tub on perimeter of deck with small cutout.
This design allows easy access to the tub from the deck
while allowing the heater to be away from the deck with
proper ventilation.
Regardless of the type of foundation you choose, make
sure it is level before proceeding.
NOTE:
During assembly, you will need about 3 feet of
space all around the tub for the tightening process. If
necessary, assemble the tub a few feet away from its final
position, then lift, slide or lower it into position (with
enough helpers!)
Section 4: Tub Supports - Chine Joists
Time needed: Approximately 40 minutes
Important! Choose a
dry day
to assemble your tub. The
floor of your tub is supported by chine joists (not
included.) The recommended dimension is 4” x 6”. Refer
to Figure 4.1 for the proper number and length of the
chine joists for your size tub.
Tub size, shape
# of joists
Joist lengths
(inches)
4’ circle
3
30, 43, 30
5’ circle
4
33, 48, 48, 33
6’ circle
4
34, 62, 62, 34
7’ circle
5
48, 72, 78, 72, 48
8’ circle
5
52, 78, 90, 78, 52
4’ ellipse
3
20, 40, 20
5’ ellipse
3
30, 52, 30
6’ ellipse
4
34, 62,62, 34
7’ ellipse
4
42, 72, 72, 42
8’ ellipse
4
48, 80, 80, 48
Figure 4.1 Chine joist specifications - Note: lengths are
approximate
The chine joists must be 4x6 or larger. Pressure treated
lumber is recommended because it will not decay. The
joists will be placed with the 6” side vertical to get the
proper 6” height of the supports.
Prepare the chine joists by cutting them to the proper
length. The tub floor will sit directly on these. This
allows air space under the tub and allows the drain
enough clearance to pass under the staves.
The weight
of the tub must be borne on the floor of the tub which is
supported on the timbers. The staves do not bear the
weight of the tub!
Figure 4.2 Level the chine joists
Once again:
DO NOT SUPPORT THE WEIGHT OF
THE TUB ON THE BOTTOM OF THE STAVES.
The flat floor of the tub should be directly on the timbers.
Use your level to get the joists level in all directions
(Figure 4.2.)
Chine joists must run perpendicular (at right
angle to) the floor seam.
See Figure 4.3 for the proper
position. Take care that they do not interfere with the
preferred position of the floor drain. If necessary move
the chine joists slightly. It is
not necessary
to glue or nail
the chine joists in place. NOTE: Chine joists spacing is
about 12”-16” apart. Adjust as necessary.
3
REV: 2018.01.11
