Installation Guide

28
Installation Practices
4.4 Protection
Protection is required when HOME-FLEX® tubing is concealed, constrained, and within 3
inches of a potential threat.
HOME-FLEX® exible gas tubing must be adequately protect-
ed wherever it is at risk of damage from puncture, shearing,
crushing, or other physical threats. Tubing is to be protect-
ed at support points, and when passing through structural
members of the building such as studs, joists, and plates as
outlined in this section. If the tubing requires protection, the
measures in this section should be followed.
Striker Plates
Shielding devices (striker plates) are used to protect the
HOME-FLEX® tubing from puncture threats such as drill bits,
nails, screws, etc. Such devices are required when the tubing
is concealed and is constrained such that the tubing would
not be able to move if struck by a puncture threat.
1. At support points and areas of possible penetration less
than 2 inches away from any edge of a stud, joist, plate, etc., shielding is required both at
the area of support and within 5 inches of each side. (Figure 4.9)
2. At support points and
points of possible pen-
etration 2-3 inches
from any edge of stud,
joist plate, or other
member, shielding is
required throughout
the area of support.
(Figure 4.10)
3. At termination points using the HOME-FLEX® termina-
tion ange, HOME-FLEX® Flexible Protective Conduit
should be installed to protect the CSST in the area be-
tween the striker plates and the outlet. (Figure 4.11)
4. For tubing routed horizontally between studs, striker
plates should be installed at each stud, and
Flexible Protective Conduit, or other approved conduit,
should be installed across the entire length of the run.
5. If striker plates can’t reasonably be installed (like be-
tween oors with enclosed joist areas or installations
when walls are already in place), schedule 40 steel pipe
has been found acceptable by CSA International for
puncture protection. Steel pipe must have an inner di-
ameter at least ½" larger than the outer diameter of the
HOME-FLEX® tubing (Table 4.4). Protection must extend
5 inches beyond the penetration of the structural mem-
bers. A 12 inch pipe length is acceptable for
penetration of a single stud. Despite this
approval, the use of striker plates is recom-
mended whenever possible.
Figure 4.9 Elevated View of Unsupported
Horizontal Tubing Run
3
1
⁄2"
5"
Protected Area
Protected Area
Outside
Wall
Support
Adequate
Distance for
Escape
Non-Restrained Length
(Safe From Puncture)
Less than 2"
5"
5"
26"
Figure 4.10 Shielding at Support Area When Penetration is 2-3 inches from Edge
Support Joist
Striker Plate
Between 2-3"
Typical Wall Stud
(Wood or Metal)
Termination
Outlet (Stud
Mounted)
Stripwound
Metal Hose
Striker Plate
Interior Wall
3-1/2"
Less than 2"
Figure 4.11 Use of Flexible Protective Conduit
Striker
Plate
Less than 3"
Typical Wall Stud
(Wood or Metal)
Interior
Wall
Termination
Outlet (Stud
Mounted)
Flexible
Protective
Conduit
3
1
⁄2"
Table 4.4 Steel Pipe Size for Puncture Protection
HOME-FLEX® Size Sch 40 Steel Pipe Size
½" 1¼"
¾" 1½"
1" 1¾"