Roof Joist Thickness

Standard asphalt shingles add very little thickness to the roof because a standard three tab shingle is about 3 16 inch thick.

Roof joist thickness.

Usually 400 450 or 600mm but any value can be used up to 610mm max 1 2 timber strength class and joist size automatically calculate sizes suitable for supporting the loads below. Span calculator for wood joists and rafters also available for the android os. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. Loads will vary with the.

There are several variables to consider when determining the proper rafter size. Featuring trus joist tji joists for floor and roof applications. This is the distance between joist centres. Structural track usually in the same gauge as the joist is used as rim or band enclosures.

Joist to girder attachments are normally supported with joist hangers easyclip e series or s series support clips. Also available for the android os. The table states that 2 x 6 rafters spaced 16 inches on center o c can span a maximum distance of 13 feet 5 inches. Though there is no standard joist size for the ceilings in all buildings most average homes use ceiling joists in a board size of 2 by 6 inches.

Ceilings directly applied to the bottom edge of the floor members or equivalent 1x or 2x strapping is a. This sizing guide for roof rafters will help determine what you need for your small project. Thickness generally improves floor. Another option are 2 x 8 rafters spaced 24 inches o c.

When installed however the shingles overlap doubling the thickness. In making your choice consider how you will insulate your insulate your roof. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.