Mississippi Residential Remodeler

Key Concepts

Fire protection and extinguisher selection - A fire extinguisher rated not less than 2A shall be provided for each 3,000 square feet of the protected building area, or major fraction thereof; travel distance from any point of the protected area to the nearest extinguisher shall not exceed 100 feet (1926.150(c)(1)(i)). - One or more extinguishers rated not less than 2A shall be provided on each floor; in multistory buildings at least one shall be located adjacent to a stairway (1926.150(c)(1)(iv)). - An extinguisher rated not less than 10B shall be provided within 50 feet of wherever more than 5 gallons of flammable or combustible liquids or 5 pounds of flammable gas are being used; this does not apply to integral fuel tanks of motor vehicles (1926.150(c)(1)(vi)). - Permitted substitutions for a 2A extinguisher: one 55-gallon open drum of water with two fire pails (c)(1)(ii); a ½-inch diameter garden-type hose line, not to exceed 100 feet, with nozzle, discharging a minimum of 5 gallons per minute with a minimum stream range of **30…

Key Concepts

Reading a window schedule. When window dimensions are specified, the width is given first and the height second; the number of lites and the window style may follow or precede the dimensions. "24½" x 24", 2 lites D.H." means the glass is 24½" wide and 24" high in a double-hung unit with two pieces of glass. "Lite" is often abbreviated L.T. The window schedule is the portion of the plans describing the windows and sizes for the glass, sash, and sometimes the rough opening; each window is located by matching its schedule number to the house plan. (Carpentry and Building Construction, Section 20.2, Page 585)

Rough openings. The rough opening is always larger than the window itself to allow for shimming and ease of installation. For a wood window, the rough opening should be about 6" wider and 10" higher than the glass size. These allowances are "fairly standard," but when the manufacturer is known, always use its recommended rough-opening sizes, because those are more precise. (Section 20.2, Page 585–586)

Mississippi Residential Remodeler

Key Concepts

Wall framing components - Cripple studs are installed above headers and below rough sills, where a full-length precut stud would go if there were no opening; they provide a nailing surface for sheathing (outside) and wall covering (inside) — Carpentry and Building Construction, Section 16.1 (Book Page 434). - Building plans include window and door schedules — charts that provide rough-opening sizes — Section 16.2, Page 440. - Lay out the first floor joist so its edge is 15¼" from the outside edge of the sill plate, then double-check that a joist is centered every 4', so sheathing panel edges fall on a joist centerline — Section 15.2, Page 405. - Square corners with the 3-4-5 rule: 3' along one leg, 4' along the other, diagonal exactly 5'. If not square, adjust a layout line before locating the remaining exterior walls — Section 16.2, Pages 438-439. - On a slab, there must be an anchor bolt within 12 inches of the end of each section of plate — *Section…

Key Concepts

Molding and trim materials and joints - Finger-jointed stock is short lengths of solid wood glued together; it is paint-grade only — acceptable if painted, not if stained (Carpentry & Building Construction, Ch. 26, Molding & Trim). - A reveal is the small offset between casing and the jamb face; casings are nailed to the door jamb allowing about a ³⁄₁₆" reveal (Carpentry & Building Construction, Ch. 26). - Use a coped joint at inside corners of profiled baseboard and crown: it holds even where walls are out of plumb and does not open visibly when wood shrinks (Ch. 26; Complete Illustrated Guide, Ch. 10 — Coping Large Moldings). - To cope, first cut an inside miter on the piece to be coped; saw straight across the square sections at top, bottom or middle (these butt, not cope) and hold the coping saw at a slight angle to back-bevel (Ch. 10 — Coping Large Moldings). - Cross-grain molding on a solid-wood case side: glue only 3 in. at the front; secure the…

6 questions · 12% of exam

Key Concepts

Plumbing systems (Carpentry and Building Construction, Section 30.1) - A plumbing system has a supply side and a drain/waste/vent (DWV) side. Supply pipes are small-diameter, usually copper; normal operating pressures inside the house range from 40 psi to 80 psi. Waste pipes are large-diameter plastic or cast iron. - A fixture is any device that receives or drains water. Inspections occur at the rough-in and finish stages, and before placing concrete on a slab foundation.

Fuel gas piping (IRC Chapter 24) - Minimum burial depth for underground piping: 12 inches below grade (G2415.12). Exception: individual lines to outdoor lights, grills and similar appliances, not less than 8 inches below finished grade (G2415.12.1). - Piping outdoors above ground shall be elevated not less than 3½ inches above ground or roof surface (G2415.9). Zinc coating is not adequate protection for underground piping (G2415.11.1). - Pressure test: not less than 1½ times the proposed maximum working pressure, but not less than 3 psig (G2417.4.1), for **not less than 10…

Key Concepts

Mixture and ordering - Concrete = cement + coarse aggregate + fine aggregate + water; hydration is the chemical reaction between water and cement that hardens it. Without coarse aggregate the material is mortar or grout. (Carpentry and Building Construction, Sec. 8.1, p. 218) - Ready-mix is ordered by bags of cement per cubic yard: five-bag mix is the minimum amount required for most work; six-bag mix is commonly specified where high strength is needed or where steel reinforcement is used. (Carpentry, Sec. 8.2, p. 226) - One cubic yard = 27 cubic feet. (Carpentry, Sec. 8.2, p. 223) - Air entrainment: concrete exposed to a freezing and thawing environment shall be air entrained with a minimum total air content of 5 percent (IRC; Modern Masonry 9th ed., Ch. 18, Sec. 18.1.4). The IRC footnote to the minimum specified compressive strength table in Section R402.2 states that concrete shall be air-entrained and total air content (percent by volume of concrete) shall be not less than 5 percent or more than 7 percent.…

Key Concepts

Unit classification and grades - A solid masonry unit is "one whose cross-sectional area in every plane parallel to the bearing surface is 75% or more of its gross cross-sectional area measured in the same plane." Cored bricks remain solid units as long as the holes comprise less than 25% of the cross-sectional area. A hollow masonry unit has less than 75% solid material in its net cross-sectional area in any plane. (Modern Masonry, 9th ed., Page 123) - Building brick grades: Grade SW is highly resistant to frost action, for brick exposed to freezing weather such as foundation courses or retaining walls; Grade MW is for moderate exposure; Grade NW is for interior backup masonry. FBX is a facing brick type, not a building brick grade. (Modern Masonry, Page 116) - Green bricks are bricks that have not been fired; they contain 5% to 30% moisture as they come from the molding or extruding machines, and most of it must evaporate before firing. (Modern Masonry, Page 115) - Second-hand units shall…

Key Concepts

Rafters and ridges - Rafters are sized from the span tables, and rafter spans are measured along the horizontal projection of the rafter (IRC R802.4.1). - A ridge board used to connect opposing rafters shall be not less than 1 inch nominal thickness and not less in depth than the cut end of the rafter (IRC R802.3). The text adds that a nonstructural ridge board is usually nominal 2" lumber slightly wider than the rafter stock (a 2×10 for 2×8 rafters) so angled rafter cuts bear fully on it (Carpentry and Building Construction, §19.1, p. 530). - Hip and valley rafters: not less than 2 inches nominal thickness and not less in depth than the cut end of the rafter (R802.4.3). - Bearing: not less than 1½ inches on wood or metal and not less than 3 inches on masonry or concrete; bearing on masonry/concrete shall be direct or a sill plate of 2-inch minimum nominal thickness providing a minimum nominal bearing area of 48 square inches (R802.6). - Purlins: continuous, supported…