Flat roof rafter span table

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The whole chicken extravaganza borders our raised bed garden.

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The coop is an extension of my compressor room on the back of my shop. The sides of the run will be covered with 1/2' hardware cloth and then 2x4 welded wire.

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The run is an outdoor area where the chickens are secure and under roof but can forage and do what chickens do. The coop is separate from the attached run.

I'll be laying perpendicular 2x4's flat on 16' centers to screw the corrugated roofing to. I decided that I would sister every other rafter so every other rafter is a double 2x4 on 16' centers.

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