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INSTALLATION DETAILS
DETAIL Q
Spaced Block With Spanner Mount
*Spacer Block(s)
1.
Spacer blocks should be installed within 1 inch of the thru-bolt.
2.
When bolt is within 2” of a rafter only one spacer block will be required on the opposite
side of the bolt, away from the rafter.
3.
Two spacer blocks are required when the bolt is more than 2” from the rafter
4.
When the mounting clips of adjacent collectors are installed side by side and the thru-
bolts are 1.5” or more apart, it will be necessary to have at least one spacer block (or
rafter) between bolts.
**Roof Sealant
– Required between mounting block and shingles/sheathing. Boltholes shall be
sealed to prevent moisture penetration.
Mounting Blocks
This drawing shows the use of a mounting block to provide the watertight seal between the
mounting hardware and the roof. Metal flashing sheets can be used instead of the mounting
blocks.
RAFTER
*WOOD SPACED
BLOCK(S) (SIZED TO
FIT SNUGLY BETWEEN
SPANNER & ROOF
SHEATHING – 2 X 4
MIN.)
PT BASE MOUNT
WASHER
SILCONE SEALANT
1-8D NAIL AT
EACH SPACER
FOUR PER UNIT
THREADED THRU-
BOLT 3/8” MIN.
MOUNTING BLOCK
SHINGLES
NUT
JAM NUT
ROOF SEALANT**
1-10D NAIL
AT EACH
RAFTER
SPANNER (2” X 4” MIN.
FOR 16” SPAN OR 2” X 6”
MIN. FOR 24” SPAN)
SHEATHING
NEOPRENE WASHER
GALVANIZED WASHER
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