Laserfiche WebLink
76 <br />TABLE II <br />Maximum clear spans for floor joists assumed live load of <br />40 lbs. per square foot; dead load 10 lbs; Spacing of joists is <br />1.6" center to center: <br />Size in inches <br />2 x 6 <br />2 x6 <br />2 x10 <br />3 x 10 <br />2 x 12 <br />#1 framing <br />feet inches <br />9 1 <br />12 1 <br />15 3 <br />17 8 <br />18 5 <br />TABLE III <br />#3 framing <br />feet inches <br />8 6 <br />11 4 <br />14 4 <br />16 9 <br />17 3 <br />Maximum clear spans for ceiling joists live load, none; dead <br />load 10 lbs. per square foot. Spacing of joists is 16" center to <br />center. <br />Size in inches feet inches <br />2 x 4 10 0 <br />2 x 6 15 4 <br />2 x 8 20 2 <br />Note: Where the attic space above the ceiling joists is un- <br />finished but is usable for 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 />Maximum clear spans of rafters for wood or asphalt shingle <br />roofs: <br />Para. 1. Clear span shall mean the distance measured <br />horizontally from the inside of the plate to a point directly <br />beneath the ridge; the actual rafter length will depend on <br />the roof slope and must be determined accordingly. <br />Para. 2. This table is for roofs with a minimum pitch of <br />5" to 12"; for the roofs with less pitch, the rafters shall be <br />figured as floor joists. Spacing center to center 20". <br />Size in inches feet inches <br />2 x 4 7 3 <br />2x6 11 4 <br />2 x 8 16 7 <br />Spacing center to center 24" <br />