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 ROOFING
Trusses-Continued
sag
overloading
n
From Truss:
loose bolts
split rings
shear plates
fastening devices
checks and splits in bracing, chord members, splice plates (scabs),
web members and filler blocks
missing filler blocks
improper end and edge distances
looseness of tie rods. (Bolts may be considered loose if after
striking head of bolt a sharp blow with a hammer, the nuts can be
taken up two full turns or more.)
n Steel Splice Plates:
rupture
shearing
crushing
rust
n Wooden Parts:
dry rot
dampness and surface moisture of long duration
termite and other insect, and fungus infestation. Termite and fungus
infestations are often detected prior to actual visual damage by
probing with a sharp-pointed instrument those areas where
prolonged dampness is not directly associated with rainfall or damp
climate
n Wooden Supports near or at Ground Level:
termite tubes or tunnels
dirt piled up to wood level
8-6
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