Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.
Roof sheeting span tables.
For domestic applications the pressures and spans are based on a maximum.
Two or more sides open roof cladding adjacent to an open side to be at least 500mm from adjacent building or boundary.
Use the two span condition for support spacing greater than 32 inches on center but no greater than 48 inches on center.
The tables permit a bearing length of up to 3 5 inches but since 1 5 is probably the worst case that you ll encounter for joist or rafter bearing it s a safe value.
Modulus of elasticity e bending design values f b.
Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.
Tables w 1 and w 2 of design values for joists and rafters a supplement to these span tables provide such values for them ostc ommonly used framing sizes.
Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21 framing connectors 22 23.
These span tables are to be used for structures that fall within the definition of open buildings i e.
1 inch 25 4 mm.
Span table the maximum recommended support spacings are based on testing in accordance with as1562 1 1992 as4040 1 1992 and as4040 2 1992.
Table 9 1 in span tables for joists and rafters figure 5 gives a required compression value of 237 psi for a span of 16 feet and bearing length of 1 5 inches.
Floor span and load tables 7 8 tips for preventing floor noise 8 allowable holes 9 cantilevers 10 11 roof span and load tables 12 13 framing connectors 14 15 section 2.
When the panel strength axis is placed parallel to framing supports the three span condition is used for support spacing up to and including 16 inches on center.
Effects of support width have been considered when determining the loads based on shear and deflection.
For commercial and industrial applications tables are based on a maximum overall height of ten metres and a 500 year design return period.
Allowable spans for lumber floor and roof sheathing a b for si.
Span tables are based on patio height and average roof heights as specified in the empty under and blocked under selection tables.
Maximum patio height hc is 3 2m.
Eaves height of six metres roof pitch of 35 degrees and total roof height of 8 5 metres.
Non cyclonic area these span tables are for use in non cyclonic areas as defined by as 1170 2 2011 connections.
Use of these span tables requires reference to the applicable design values for the various species and grades of lumber.
For strength axis parallel to supports tables are based on three spans for spans of 16 inches or less and two spans for 24 inches.
For heights outside these ranges contact stramit for further information.
