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.

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. Also available for the android os. In making your choice consider how you will insulate your insulate your roof.

This sizing guide for roof rafters will help determine what you need for your small project. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. Joist to girder attachments are normally supported with joist hangers easyclip e series or s series support clips. Ceilings directly applied to the bottom edge of the floor members or equivalent 1x or 2x strapping is a.

Structural track usually in the same gauge as the joist is used as rim or band enclosures. When installed however the shingles overlap doubling the thickness. Featuring trus joist tji joists for floor and roof applications. This is the distance between joist centres.

Thickness generally improves floor. Loads will vary with the. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. Depending on loads and spans c joists are typically spaced at 12 16 19 2 or 24 on center spacing.

Span calculator for wood joists and rafters also available for the android os. There are several variables to consider when determining the proper rafter size. Another option are 2 x 8 rafters spaced 24 inches o c.