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TABLE I <br /> Maximum clear spans for wood girders: <br /> 1M2 <br /> One story dwelling story dwellings <br /> Size in inches feet inches feet inches <br /> 4x6 5 0 4 0 <br /> 6x6 6 0 5 2 " <br /> 4x8 6 4 5 6 <br /> 4x10 8 0 7 0 <br /> 6x8 8 0 7 0 <br /> 6xl0 9 0 8 0 yy <br /> TABLE IL 1 <br /> Maximum clear spans for floor joists .assumed live load of <br /> 40 lbs, per square foot; dead load 10 lbs.; Spacing of joists <br /> is 16" center to center. <br /> #1 framing #3 framing <br /> Size in inches feet inches feet inches 1 <br /> 2x6 9 1 8 6 <br /> 2 x 8 12 1 11 4 <br /> 2 x 10- 15 3 14 4 <br /> 3 x 10 17 8 16 9 <br /> 2 x 12 18 5 17 3 <br /> TABLE III <br /> Maximum clear spans for ceiling <br /> g joist live load, none; dead <br /> load 10 lbs. per square foot. Spacing of joists is 16" center a <br /> to center. <br /> Size in inches feet inches <br /> 2x4 10, 0 } <br /> 2x6 15 4 <br /> 2x8 20 2 <br /> Note: Where the attic space above the ceiling joists is un- <br /> finished but is usable far storage space, or if the space is <br /> suitable for finishing into future habitable rooms, the spans <br /> for the ceiling joists shall be figured the same as for floor <br /> joists. <br /> TABLE IV <br /> c: <br /> Maximum clear spans of rafters for wood or asphalt shingle <br /> roofs: <br /> 7 <br /> i <br />