Installation Manual

APPENDIX E:
CROSS-SECTION OF SNOW MELT CABLE IN STAIRS
14
2.5” in (6.3cm) maximum
thickness brick or concrete
paver
1.5” sand, stone
dust or mortar
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
Level of
heating
cable
2” (5 cm)
3” (7.6 cm)
8”-12” crushed
rock aggregate
Right
hot/cold joints 3
in (7.6 cm) apart
and 6 in (15 cm)
from slab edge
Wrong
hot/cold joints
installed on
slab edge
Wrong
hot/cold joints
bunched
concrete wall
Junction box mounted on
inside wall
Control joint
Concrete
Heating cable secured
to rebar with plastic tie
wraps
Steel bar
3”
3”
Cable identification tag
(within 3 in (7.5cm) of NPT
connector)
Cold lead
Conduit
Expansion joint
Heated Slab
Conduit
Hot/Cold
joint
Heating
cable
Cold leads protected with 3/4” diameter rigid metal
conduit or other approved means. The conduit
should be at the bottom of slab and coming into
the slab approximately 6”
Topping 2 in. (5.0 cm)
minimum, to 3 in. (7.5 cm)
maximum thickness
Dimension B must not
exceed 3.5 in (8.9 mm)
Dimension A must not
exceed 3 in (7.5 cm)
If dimension C exceeds 3
in(10 cm) an additional run
of cable must be used
Pavers - No lip overhang
B
Splice
(12” from
slab edge)
Lip edge rounded off to
prevent cable damage
4’
6’
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
5” - 6”deep
Cable must be at least 4 in
(10 cm) from side edge
C
A
Handrail posts should be
pre-sleeved, prior to the
pouring of concrete or mortar
100%
Heating cable should
be tied off with plastic zip
ties to a heavy gauge
wire mesh that has been
staked down to the base.
4” (splice
to conduit)
2.5” in (6.3cm) maximum
thickness brick or concrete
paver
1.5” sand, stone
dust or mortar
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
Level of
heating
cable
2” (5 cm)
3” (7.6 cm)
8”-12” crushed
rock aggregate
Right
hot/cold joints 3
in (7.6 cm) apart
and 6 in (15 cm)
from slab edge
Wrong
hot/cold joints
installed on
slab edge
Wrong
hot/cold joints
bunched
concrete wall
Junction box mounted on
inside wall
Control joint
Concrete
Heating cable secured
to rebar with plastic tie
wraps
Steel bar
3”
3”
Cable identification tag
(within 3 in (7.5cm) of NPT
connector)
Cold lead
Conduit
Expansion joint
Heated Slab
Conduit
Hot/Cold
joint
Heating
cable
Cold leads protected with 3/4” diameter rigid metal
conduit or other approved means. The conduit
should be at the bottom of slab and coming into
the slab approximately 6”
Topping 2 in. (5.0 cm)
minimum, to 3 in. (7.5 cm)
maximum thickness
Dimension B must not
exceed 3.5 in (8.9 mm)
Dimension A must not
exceed 3 in (7.5 cm)
If dimension C exceeds 3
in(10 cm) an additional run
of cable must be used
Pavers - No lip overhang
B
Splice
(12” from
slab edge)
Lip edge rounded off to
prevent cable damage
4’
6’
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
5” - 6”deep
Cable must be at least 4 in
(10 cm) from side edge
C
A
Handrail posts should be
pre-sleeved, prior to the
pouring of concrete or mortar
100%
Heating cable should
be tied off with plastic zip
ties to a heavy gauge
wire mesh that has been
staked down to the base.
4” (splice
to conduit)
2.5” in (6.3cm) maximum
thickness brick or concrete
paver
1.5” sand, stone
dust or mortar
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
Level of
heating
cable
2” (5 cm)
3” (7.6 cm)
8”-12” crushed
rock aggregate
Right
hot/cold joints 3
in (7.6 cm) apart
and 6 in (15 cm)
from slab edge
Wrong
hot/cold joints
installed on
slab edge
Wrong
hot/cold joints
bunched
concrete wall
Junction box mounted on
inside wall
Control joint
Concrete
Heating cable secured
to rebar with plastic tie
wraps
Steel bar
3”
3”
Cable identification tag
(within 3 in (7.5cm) of NPT
connector)
Cold lead
Conduit
Expansion joint
Heated Slab
Conduit
Hot/Cold
joint
Heating
cable
Cold leads protected with 3/4” diameter rigid metal
conduit or other approved means. The conduit
should be at the bottom of slab and coming into
the slab approximately 6”
Topping 2 in. (5.0 cm)
minimum, to 3 in. (7.5 cm)
maximum thickness
Dimension B must not
exceed 3.5 in (8.9 mm)
Dimension A must not
exceed 3 in (7.5 cm)
If dimension C exceeds 3
in(10 cm) an additional run
of cable must be used
Pavers - No lip overhang
B
Splice
(12” from
slab edge)
Lip edge rounded off to
prevent cable damage
4’
6’
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
5” - 6”deep
Cable must be at least 4 in
(10 cm) from side edge
C
A
Handrail posts should be
pre-sleeved, prior to the
pouring of concrete or mortar
100%
Heating cable should
be tied off with plastic zip
ties to a heavy gauge
wire mesh that has been
staked down to the base.
4” (splice
to conduit)
2.5” in (6.3cm) maximum
thickness brick or concrete
paver
1.5” sand, stone
dust or mortar
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
Level of
heating
cable
2” (5 cm)
3” (7.6 cm)
8”-12” crushed
rock aggregate
Right
hot/cold joints 3
in (7.6 cm) apart
and 6 in (15 cm)
from slab edge
Wrong
hot/cold joints
installed on
slab edge
Wrong
hot/cold joints
bunched
concrete wall
Junction box mounted on
inside wall
Control joint
Concrete
Heating cable secured
to rebar with plastic tie
wraps
Steel bar
3”
3”
Cable identification tag
(within 3 in (7.5cm) of NPT
connector)
Cold lead
Conduit
Expansion joint
Heated Slab
Conduit
Hot/Cold
joint
Heating
cable
Cold leads protected with 3/4” diameter rigid metal
conduit or other approved means. The conduit
should be at the bottom of slab and coming into
the slab approximately 6”
Topping 2 in. (5.0 cm)
minimum, to 3 in. (7.5 cm)
maximum thickness
Dimension B must not
exceed 3.5 in (8.9 mm)
Dimension A must not
exceed 3 in (7.5 cm)
If dimension C exceeds 3
in(10 cm) an additional run
of cable must be used
Pavers - No lip overhang
B
Splice
(12” from
slab edge)
Lip edge rounded off to
prevent cable damage
4’
6’
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
5” - 6”deep
Cable must be at least 4 in
(10 cm) from side edge
C
A
Handrail posts should be
pre-sleeved, prior to the
pouring of concrete or mortar
100%
Heating cable should
be tied off with plastic zip
ties to a heavy gauge
wire mesh that has been
staked down to the base.
4” (splice
to conduit)
2.5” in (6.3cm) maximum
thickness brick or concrete
paver
1.5” sand, stone
dust or mortar
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
Level of
heating
cable
2” (5 cm)
3” (7.6 cm)
8”-12” crushed
rock aggregate
Right
hot/cold joints 3
in (7.6 cm) apart
and 6 in (15 cm)
from slab edge
Wrong
hot/cold joints
installed on
slab edge
Wrong
hot/cold joints
bunched
concrete wall
Junction box mounted on
inside wall
Control joint
Concrete
Heating cable secured
to rebar with plastic tie
wraps
Steel bar
3”
3”
Cable identification tag
(within 3 in (7.5cm) of NPT
connector)
Cold lead
Conduit
Expansion joint
Heated Slab
Conduit
Hot/Cold
joint
Heating
cable
Cold leads protected with 3/4” diameter rigid metal
conduit or other approved means. The conduit
should be at the bottom of slab and coming into
the slab approximately 6”
Topping 2 in. (5.0 cm)
minimum, to 3 in. (7.5 cm)
maximum thickness
Dimension B must not
exceed 3.5 in (8.9 mm)
Dimension A must not
exceed 3 in (7.5 cm)
If dimension C exceeds 3
in(10 cm) an additional run
of cable must be used
Pavers - No lip overhang
B
Splice
(12” from
slab edge)
Lip edge rounded off to
prevent cable damage
4’
6’
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
5” - 6”deep
Cable must be at least 4 in
(10 cm) from side edge
C
A
Handrail posts should be
pre-sleeved, prior to the
pouring of concrete or mortar
100%
Heating cable should
be tied off with plastic zip
ties to a heavy gauge
wire mesh that has been
staked down to the base.
4” (splice
to conduit)
Estimators’ example:
Stair treads have to be 11-12” deep.
Landing = 4’ x 6’ = 24 sq.ft X 4 = 96 FT
3 steps (12” x 6’ each) ... we want 4 passes of cable per tread.
Subtract 3” from each side (making room for hand rail posts)
5.5’ X 4 = 22 FT plus 3 FT = 25 FT per tread
3 FT is the amount needed for curves and tread riser.
Solution: 96 FT + 25 FT + 25 FT + 25 FT = 171 FT
Pick closest cable match = WHCA-240-0171