Installation Manual

APPENDIX W:
EXPANSION AND CONTROL JOINT CROSS SECTION
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 6
in (15 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 1-1/2in (3.8cm)
minimum nonmetallic conduit
where they emerge from slab
Topping 2 in (5.0 cm)
minimum to 3 in (7.5 cm)
maximum thickness
Dimension B must not
exceed 6 in (15 cm)
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
B
Conduit for slab temperature sensor
Corner rounded off to
prevent cable damage
1.2 in (1.3 cm) wide steel
prepunched strapping
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
Cable must be at least 4 in
(10 cm) from edge
C
A
Expansion joint
Concrete
Heating cable secured to
rebar with plastic tie wraps
Steel bar
3”
3”
HOUSE
DRIVEWAY
RELAY
J-BOX
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 6
in (15 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 1-1/2in (3.8cm)
minimum nonmetallic conduit
where they emerge from slab
Topping 2 in (5.0 cm)
minimum to 3 in (7.5 cm)
maximum thickness
Dimension B must not
exceed 6 in (15 cm)
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
B
Conduit for slab temperature sensor
Corner rounded off to
prevent cable damage
1.2 in (1.3 cm) wide steel
prepunched strapping
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
Cable must be at least 4 in
(10 cm) from edge
C
A
Expansion joint
Concrete
Heating cable secured to
rebar with plastic tie wraps
Steel bar
3”
3”
HOUSE
DRIVEWAY
RELAY
J-BOX
33