ICC G13 Residential Building Contractor (C) Exam (2018 IRC)

Direct bearing on masonry or concrete must be not less than 3 inches, while a 2-inch minimum nominal thickness sill plate placed under the member must instead provide a minimum nominal bearing area of 48 square inches.

Ends of each rafter, ceiling joist, floor joist, beam or girder require not less than 1½ inches of bearing on wood or metal but not less than 3 inches on masonry or concrete.

Exterior/bearing-wall studs may be cut or notched to a depth not exceeding 25 percent of the stud width, while nonbearing partition studs may be notched up to 40 percent.

Any stud may be bored provided the hole is not more than 60 percent of the stud width, but in exterior walls or bearing partitions holes over 40 percent up to 60 percent require the stud to be doubled, with not more than two successive doubled studs bored.

Without sprinklers, unlimited unprotected openings in 0-hour exterior walls require a fire separation distance of 5 feet or greater; with sprinklers, exterior walls are permitted to be non-fire-resistance rated at a fire separation distance of 3 feet or greater.

Concrete and masonry foundation walls shall extend above finished grade not less than 4 inches where masonry veneer is used and not less than 6 inches elsewhere.

Anchor bolts connecting cold-formed steel framed walls to foundations must extend not less than 15 inches into masonry but not less than 7 inches into concrete (and be not more than 12 inches from corners or bottom-track terminations).

LABELED means a mark of a nationally recognized testing laboratory or approved agency is affixed and that organization maintains periodic inspection of production; LISTED refers to inclusion in a published list, and APPROVED means acceptable to the building official.

REPAIR is reconstruction, replacement or renewal of any part of an existing building for maintenance or to correct damage; ALTERATION is construction, retrofit or renovation other than repair or addition that requires a permit, and ADDITION is an extension or increase in floor area, number of stories or height.

A built-up roof covering is two or more layers of felt cemented together with a surfacing, whereas a modified bitumen covering is one or more layers of polymer modified asphalt sheets and a single-ply membrane uses one layer of membrane material.

A roof recover is not permitted where the existing covering is slate, clay, cement or asbestos-cement tile (or the roof is water soaked/deteriorated or already has two or more applications), but metal panel, metal shingle and concrete and clay tile coverings may be installed over existing wood shake roofs.

A third top plate is an accepted exception for aligning bearing studs under members spaced over 16 inches on center, but it is NOT a permitted method of connecting braced wall top plates to perpendicular roof trusses, which requires soffit blocking panels, vertical blocking panels, truss-manufacturer blocking panels designed per R802, or engineered load-transfer methods.