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Roof Operations- by Craig Reed.pdf

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• Diagnostic Methods<br />

Plug cut<br />

• A small triangular piece of<br />

roofing material is removed<br />

• Reveals the type of roof<br />

decking<br />

• Can aid in determining rafter<br />

direction<br />

• Metal joists are 90-degrees<br />

to corrugations in metal deck<br />

roofs.<br />

• Rafters are 90-degrees to<br />

the grain of sheathing

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