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Installing the .98 m mast on
a wood framed roof:
Chapter 4 • Installing mounts
48
1035678-0001 DRAFT Revision 1.04
procedures
DANGER
Before starting the installation procedure, ensure that there
are no power lines nearby. If the satellite dish contacts
electric power lines, you will be killed or seriously injured.
CAUTION
• Rafters or trusses must be located 16 to 24 inches apart
on center, except for large-timber roofs, which can be
located no more than 24 inches apart on center.
• The roof surface must consist of relatively thin, resilient
materials, such as asphalt or composite shingles, sheet
metal, or similar materials, over wood sheathing with a
thickness that must not exceed 3/4 inch.
• Satellite dishes cannot be installed on slate roofs or
Spanish tile roofing made of clay or other brittle
materials.
• The roof pitch (also called slope) must be between 3:12
and 12:12.
• Center hole lag screws must be centered in the rafter or
truss.
• The satellite dish should not be installed on a wood
framed roof unless the interior is unfinished so that
placement of lag screws can be verified and the roof
reinforced if necessary.
• Install the satellite dish only as described in this
manual.
Before you begin, ensure that the rafters or trusses (called
members) in the house are located 16 to 24 inches on center.
Remember that 2 x 4 and 2 x 6 inch members are actually 1-1/2
inches thick. Also, because small movements by the mast foot are
amplified at the end of the mast, re-plumb when directed to do so.
Note: For an installation to be successful, the mast must be
plumb. Re-plumb the mast whenever instructed to do so, and
re-plumb it whenever you feel it is necessary.
1. Mark the centerline on the rafter or truss.
2. Orient the mast foot so the horizontal oval hole in the mast
foot is at the top as in Figure 17 before installation.
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