Manual

Table B-2 Overhang Multiplier
ROOF OVERHANG Multiplier Multiplier
Inches Centimeters For roof For roof
with gutter without gutter
less than 12 less than 30 4.0 3.0
12 30 4.0 3.0
24 60 5.3 4.3
36 90 6.8 5.8
48 120 8.1 7.1
60 150 9.6 8.6
72 180 11.2 10.2
ENG
20 ADKS Owner’s Manual
Figure B-2. Roof Measurements
B
C
E
D
XI. APPENDIX B: ESTIMATING THE CABLE LENGTH YOU NEED
An accurate estimate of the cable length you need is important because you
cannot change the cable length by cutting, splicing or altering it in any way.
Doing so may result in fire, electrocution, or ice dam formation.
Cable should be installed on roof areas where ice dams form. This can be
the entire roof edge or specific areas such as beneath skylights, in valleys
or around dormers. Cable should also be installed in any nearby gutters,
downspouts and/or valleys.
• If you need to apply the cable on a roof with gutter, downspouts, valleys,
and/or dormers, follow “A. For Typical Roof Applications” below.
• If you only need to install the cable in the gutters only, follow “B. For
Problems in the Gutter Only” on page 21.
A. FOR TYPICAL ROOF APPLICATION
STEP 1. For each area listed in Table B-1, measure the required dimen-
sions (see Figures B-1 and B-2) and calculate the length of cable
needed. Add each “area” calculation to determine the total cable
length needed.
Figure B-1.
Overhang Measurement
A
Overhang
Area What to measure How to calculate
Along Roof Overhang (A) Length of roof (B) X Overhang Multiplier (see Table B-2)
Length along roof (B)
Dormer Distance around dormer (C) Number of dormers X Distance around dormer(s) (C)
Valley Number of valleys (D) Number of valleys (D) X 6 feet or 1.8 meters
Downspouts Number of downspouts Number of downspouts X Length of downspout (E) X 2
Length of downspouts (E)
Table B-1 Cable Length Estimation Formula for Typical Roof Applications
• If you need to install the cable on a roof with special roof areas such as
a roof with skylights, follow “C. For Roofs with Special Roof Area Ap-
plications” on page 22.
Note: For overhangs not listed, estimate multiplier. For example, for an 18" over-
hang with a gutter, multiplier will be about 4.7.
Modelo ADKS guía del usuario 49
ESP
Modelo ADKS guía del usuario
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