IRC Building Code Questions with Complete Solutions 2023

IRC Building Code Questions with Complete Solutions 2023 In Seismic Design Categories D0, D1, and D2, _____ stone masonry walls shall not be used. Rubble R404.1.1.1 Masonry foundation walls. In Seismic Design Categories Do, D1 and D2, foundations with stem walls shall be provided with a minimum of one No. ___ bar within 12 inches of the top of the wall and one No. ___ bar located 3 to 4 inches from the bottom of the footing. #4 #4 R403.1.3.1 Foundations with stemwalls The grade away from foundation walls shall fall a minimum of ___ inches within the first ____ feet. 6 in. 10 ft. (Read exception) R401.3 Drainage In flood hazard areas, enclosed areas below the design flood elevation shall be used sole for: 1._____ 2._____ 3._____ Parking of vehicles Building access or Storage R322.3.5 Enclosed areas below design flood elevation. Address number shall be a minimum of ___ inches high with a minimum stroke of ____inch. 4 in. 1/2 in. R319.1 Address numbers Protection of wood and wood based products from ___ shall be provided by the use of naturally durable wood or wood that is preservative treated. Decay R317.1 Location required Dwelling Units in two-family dwellings shall be separated from each other by wall and/or floor assemblies having not less than ___-hour fire resistive rating. 1 hour R302.3 Two family dwellings In areas where the probability of termite infestation is "very heavy", the clearance between foam plastics installed above grade and exposed earth shall be at least ____ inches. 6 in. R318.4 Foam plastic protection A thermal barrier is not required for foam plastic insulation in an attic that is entered only for purposes of ____ or ____. Repairs or maintenance R316.5.3 Attics Foam plastic shall be separated from the interior of a building by an approved ____ ____ of minimum ____- inch gypsum wallboard. Thermal barrier 1/2 in. R316.4 Thermal barrier All exterior footings shall be placed at least ___ inches below the undisturbed ground surface. 12 in. (Where applicable, the dept of footings shall also conform to R403.1.4.1 - R403.1.4.2) R403.1.4 Minimum length The top surface of footings shall be level. The bottom surface of footings shall not have a slope exceeding ____ unit vertical in ____ units horizontal. 1:10 R403.1.5 Slope Wood sill plates shall be anchored to the foundation with anchor bolts spaced a maximum of ____ feet on center. 6 ft. R403.1.6 Foundation anchorage Foundation anchor bolts shall be at least ___ inch in diameter and shall extend a minimum of ___ inches into the concrete or grouted cells of concrete masonry units. 1/2 in. 7 in. R403.1.6 Foundation anchorage Isolated hollow masonry piers shall have a minimum nominal thickness of ____ inches. 8 in. R404.1.9 Isolated masonry piers. Hollow masonry piers shall be capped with ____ inches of solid masonry or concrete or a masonry cap block. 4 in. As an alternative, the cavities of of the top course must be filled with concrete or grout. R404.1.9.1 The studs used in wood foundation walls shall be ____-inch by ____-inch members. 2-inch by 6-inch R404.2.2 Stud size Wood sill plates shall be a minimum of ____-inch by ____-inch nominal lumber. 2-inch by 4-inch R404.3 Wood sill plates Perforated foundation drains shall be surrounded with an approved ____ ____. Filter membrane (or the filter membrane shall cover the washed gravel or crushed rock covering the drain) R405.1 Concrete or masonry foundations The minimum net area of ventilation openings shall be not less than ____ square foot for each ___ square feet of under-floor space. 1 sq. ft. for each 150 sq. ft. R408.1 Ventilation Ventilation openings in under-floor spaces are not required where the ground is covered with a continuous ____ vapor retarder and the joints overlap at least ____ inches. Class I 6 R408.3 Unvented crawl space The minimum required floor access opening to all under-floor spaces shall be ____ inches by ____ inches. 18 inches by 24 inches. R408.4 Access Open web truss or I-Joist floor assemblies require a ____-inch gypsum wallboard membrane, ____-inch wood structural panel membrane, or the equivalent on the underside. 1/2 gypsum 5/8 wood R501.3 Fire protection of floors The ends of each floor joist, beam or girder shall have not less than ____ inches of bearing on wood or metal and not less than ____ inches on masonry or concrete. 1.5 in. 3 in. (except where supported on a 1 inch by 4 inch ribbon strip and nailed to the adjacent stud or by the use of approved joist hangers. This is the same for rafters and ceiling joists. R502.6 Bearing Notches in solid lumber joists, rafters and beams shall not exceed ____ of the depth, shall not be longer than ____ of the depth, and shall not be located in the middle ____ of the span. 1/6 in. 1/3 in. 1/3 in. R502.8.1 Sawn lumber. The tension side of floor joist members ___ inches or greater in nominal thickness shall not be notched except at the ends of the members. 4 in. R502.8.1 Sawn lumber When the header joist span does not exceed ____ feet, the header joist may be a single member the same size as the floor joist. 4 ft. (When the header joist span exceeds 4 feet the trimmer joists and header joists shall be doubled) R502.10 Framing of openings In combustible construction, where there is usable space both above and below a floor/ceiling assembly, draft stops shall be installed so that the area of the concealed space does not exceed ____ square feet. 1000 sq. ft. (Draft-stopping shall divide the concealed space into approximately equal areas. R302.12 Draft-stopping The provisions of Section R505 Steel Floor Framing shall control the construction of cold-formed steel floor framing for building not greater than ____ feet in length perpendicular to the joist span. 60 ft. (Read this section for more applicability limits). R505.1.1 Applicability limits Flanges and lips of load-bearing cold-formed steel floor framing members shall not be cut or ____. Notched R505.3.5 In cold-formed steel framing, floor cantilevers for the top floor of a two- or three-story building or the first floor of a one-story buidling shall not exceed ____. 24 in. R505.3.6 Floor cantilevers Concrete slab-on-ground floors shall be a minimum of ____ inches thick. 3.5 in. R506.1 General The connection between a deck ledger and a 2-inch nominal lumber band joist shall be constructed with ____-inch lag screws or bolts with washers. 1/2 in. (In accordance with Table R507.2. See figures R507.2.1(1) and R507.2.1(2) R507.2 Deck ledger connection to band joist. For wood stud walls, end joints in top plates shall be offset at least ____ inches. 24 in. R602.3.2 Top plate When joists, trusses or rafters are spaced more than 16 inches on center and the bearing studs below are spaced 24 inches on center, such members shall bear within ____ inches of the studs beneath. 5 in. (Read 3 exceptions in this section) R602.3.3 Bearing studs Any wood stud in an exterior wall or bearing partition may be cut or notched to a depth not exceeding ____ percent of its width. 25% R602.6 Drilling and notching studs #1 Wood studs in non bearing partitions may be notched to a depth not exceeding ____ percent of a single stud width. 40% R602.6 Drilling and notching studs #1 Exterior wood frame walls shall be offset not more than ___ feet from the designated braced wall line location. 4 ft. (See figure R602.10.1.1) R602.10.1.2 Offsets along a braced wall line. Braced wall lines greater than 16 feet shall have a minimum of ____ braced wall panels. two R602.10.2.3 Minimum number of braced wall panels. Wall bracing Method PFG (Portal frame at garage door openings) is limited to walls supporting ____ ____ and a _____. One story Roof (This method is also limited to Seismic Design Categories A, B and C. R602.10.6.3 Method PFG: Portal frame at garage door openings in Seismic Design Categories A, B and C. In two-story buildings located in Seismic Design Category D2, all braced wall panels shall be supported on ____ foundations. Continuous R602.10.9.1 Braced wall panel support for Seismic. Unfaced fiberglass batt insulation is ____ to be used for fireblocking. Permitted (When it fills the entire cross section of the wall cavity to a minimum height of 16" measured vertically. R302.11.1.2 Unfaced fiberglass. Braced wall panels shall be constructed with intermittent bracing methods, or the continuous sheathing methods. Mixing of bracing methods shall be ____. Permitted (Review the mixing of methods in this section) R602.10.4.1 Mixing methods. In order to use the simplified wall bracing methods, the building must be located where the basic wind speed is less than or equal to ____ mph. 90 R602.12 Simplified wall bracing. Load-bearing cold-formed steel studs shall be located in-line with joists, trusses and rafters with a maximum tolerance of ____ inch between the centerline of the horizontal and vertical framing members. 3/4 in. R603.1.2 In-line framing. Web holes in steel wall studs shall not exceed ____ inches in width or ____ inches in length. 1 1/2 in. 4 1/2 in. (see figure R603.2.5.1) R603.2.5.1 Web holes. Steel studs and other structural members shall not be ___. Spliced (Tracks can be spliced in accordance with Figure R603.3.5) R603.3.5 Splicing. In cold-formed steel framing king, jack and cripple studs shall be of the same dimension and thickness as the adjacent ____ studs. Wall R603.7 Jack and King studs. The minimum thickness of masonry bearing walls more than one story high shall be ____ inches. 8 in. R606.2.1 Minimum thickness. Solid masonry walls of one-story dwellings and garages shall not be less than ____ inches in thickness when not greater than 9 feet in height. 6 in. (Provided that when gable construction is used, an additional 6 feet is permitted to the peak of the gable) R606.2.1 Minimum thickness. Grout shall not be pumped through ____ pipes. Aluminum R609.1.4.1 Grout pumped through aluminum pipes. The provisions for structural insulated panel walls are limited to buildings not greater than ___ stories in height with each wall not greater than ____ feet high. Two 10 (These provisions are also limited to Seismic Design Categories A, B and C.) R613.2 Applicability limits. Wood wall framing supporting 3/8 inch gypsum board shall not be spaced more than ____ inches on center. 16 in. (Review the tables an diagrams in this chapter.) R702.3.5 Minimum Thickness and Application of... Use of water-resistant gypsum backing board shall be permitted to be used on ceilings where framing spacing does not exceed ____ inches on center for 1/2 inch thick gypsum board. 12 in. (Or 16 inches for 5/8 inch think gypsum board.) R702.3.8 Water-resistant gypsum backing board.