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DIS1,
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10
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ANE
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A
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VARIABLE LENGTH (LV)
The Variable Length (
LV
) has one major function. It makes up odd lengths
of duct. It must not be used for expansion compensation.
It is shipped with a flanged retaining band assembly on the inner sliding wall.
The
LV
is adjustable from 7 1/2 to 28 inch.
See Figure 1 6 .
Figure 16 – Variable Length (LV)
TEES
90
°
TEE (T90)
The 90° Tee is generally used to connect horizontal connectors into a vertical
section as well as a drain or inspection fittings.
NOTE
: For the maximum height of chimney above a based supported Tee, see Table 4
in the SUPPORT METHODS AND HEIGHT LIMITS section.
Figure 17 – T90
TEE PRECAUTION
1. Use an adjustable length in all horizontal breechings or laterals.
2. If more than ¼” of thermal expansion is expected between the
tee and the next fixed support point;
a. The tee should be protected from bending moments by use of an Adjustable
Length (See the section on the Adjustable Length)
b. And the use of two axis support is recommended.
3. Provide access for easy removal of Tee Caps.
45 TEE (T45) and DOUBLE 45 TEE (TD45)
See Figure 18 for the 45 Tee (T45) and Figure 19 for the Double Tee
(DT45)
Isolate these Tees from the effectives of Thermal Expansion.
Top Figure 18 T45 | Bottom | Figure 19 |Double Tee 45 (DT45)
LATERAL TEE (BT)
The Lateral Tee (BT) is a 45 Tee with a 45 Elbow integrated in it.
Figure 20 Lateral Tee (BT)
Half
Outer
Retaining
Band
Flow
Gas
Flow
Cuttable
half
siding
outer
casing
Adjustable
Flanged
retaining
Band
Cuttable
sliding
Inner
Wall
