Mississippi Remodeling

Key Concepts

Employer/contractor responsibilities. The employer must initiate and maintain programs needed to comply with Part 1926, and those programs must provide for "frequent and regular inspections of the job sites, materials, and equipment" by competent persons designated by the employer (§1926.20(b)(1)–(2)). Noncomplying machinery, tools, or equipment must be tagged or locked out or physically removed (§1926.20(b)(3)), and only employees qualified by training or experience may operate equipment (§1926.20(b)(4)). PPE and training standards impose a separate compliance duty for each employee (§1926.20(f)(1)–(2)). The prime contractor retains overall responsibility; prime and subcontractors have joint responsibility for subcontracted work. "Shall" is mandatory; "should" is recommended (§1926.32(q), (r)).

Safety training. The employer shall instruct each employee in the recognition and avoidance of unsafe conditions and applicable regulations (§1926.21(b)(2)). Employees handling poisons, caustics, and harmful substances must be instructed in safe handling, hazards, personal hygiene, and protective measures (§1926.21(b)(3)); employees using flammable liquids, gases, or toxic materials must…

Mississippi Remodeling · 3 questions (5% of exam)

Key Concepts

Window types and operation. There are six major types: double-hung, casement, stationary, awning, hopper, and horizontal-sliding (Ch. 20, Types of Windows). Only half of a double-hung or single-hung window can be opened at one time; one advantage of the casement window over the double-hung type is that the entire window area can be opened for ventilation (Ch. 20, Double-Hung Windows and Casement Windows). Casements have a side-hinged sash swinging inward or outward, with hardware consisting of a rotary opener, a hinge assembly, and a sash lock; double-hung hardware includes one or two metal sash locks. Screens go on the outside for double-hung, sliding, and hopper windows, and on the inside for casement and awning windows that open out.

Key Concepts

Framing systems - Balloon framing: studs run continuously from the sill plate to the second-floor top plate; second-floor joists bear on 1×4 ribbons (ribands) cut into the inside edges of the studs (§14.1, pp. 370–371). - Dead load = total weight of the building and anything permanently attached; live load = weight not permanently attached (furniture, people), based on building use (§14.1, p. 383). - Conventional light-frame limits (2021 IBC): max floor-to-floor height 11 ft 7 in., stud height max 10 ft for exterior bearing/interior braced walls (§2308.2.2); ground snow load max 50 psf and average dead load max 15 psf for combined roof/ceiling, exterior walls, floors, partitions (§2308.2.3); ceiling joist/rafter framing and trusses max 40 ft between points of vertical support — a ridge board is not a vertical support (§2308.2.5).

Key Concepts

Stair codes - Minimum headroom on stairs and landings is 6'-8", measured from the outermost edge of the nosing to the ceiling surface directly overhead; main stairways generally have 7'-4" to 7'-7" (Section 25.1, 'Headroom' under Stair Codes; Page 740). - Maximum riser height 7-3/4"; minimum tread depth 10". Ideal riser is 7" and ideal tread is 11" (Section 25.1, 'Risers and Treads'). - Variation between tallest and shortest riser may be no more than 3/8"; same limit applies between deepest and shallowest tread (Section 25.1, Page 740). - Two handrails: minimum clear width between them is 25". One handrail: minimum clear width to the opposite wall is 31-1/2" (Section 25.1, 'Stairway Width'). - Handrail height 34" to 38", measured vertically from the upper edge of the nosing to the top of the handrail, with at least 1-1/2" between handrail and wall (Section 25.1, 'Handrails'). - Winders must be at least **10"…

Key Concepts

Moisture protection - Building paper (asphaltic felt) minimum weight required by code beneath siding is No. 15 (15 lb. paper). No. 30 is available but is heavier than the minimum requirement. (Ch. 23 — Preventing Moisture Problems) - Building paper is applied smoothly to sheathing with staples. Succeeding (horizontal) layers lap at least 2 inches over strips previously applied; where vertical joints are necessary, lap at least 6 inches. (Ch. 23 — Building Paper) - Housewrap should not be used beneath stucco, because the stucco can bond to the housewrap in a way that causes it to lose effectiveness. Building paper and wrinkle wrap (used to create a drainage plane) are acceptable behind stucco. (Ch. 23 — Housewrap) - A drainage plane is a gap or series of gaps behind the siding that allows water to drain freely. Without it, stucco would stick to the sheathing paper and block drainage. *(Ch. 23…

Mississippi Remodeling · 2 questions (3% of the exam)

Key Concepts

Panel edges and types - The edges along the length of a standard drywall panel are tapered so joints between panels can be filled with joint compound and smoothed flush with the surface (Carpentry and Building Construction, Ch. 32, Standard Drywall section). - Face paper wraps around the long edges but does not cover the short edges. Sheets with square-cut long and short edges are used as a substrate for paneling and other materials (Ch. 32, p. 917).

Fire-code drywall - Type-X fire-code drywall is ⅝" thick and contains glass fibers that prevent it from crumbling in extreme heat. Required by code on the outer surface of walls separating an attached garage from the house, and on garage ceilings where the garage is beneath a habitable room (Ch. 32, Fire-Code Drywall section). - Type-C drywall is even more fire resistant than Type-X and…

Key Concepts

Ingredients and hydration - Concrete = cement + water + fine aggregate + coarse aggregate. Material is not concrete unless all four are present; if coarse aggregate is missing, the result is mortar or grout (Carpentry and Building Construction, Ch. 8 — Concrete Ingredients). - Hydration is the chemical reaction between water and cement; it generates heat and causes hardening. Concrete does not "dry out" (Ch. 8 — Hydration). - Concrete gains most of its strength in the 28-day period after placement, and continues gaining strength for many years (Ch. 8 — Hydration, Moist-Curing). - In Portland cement manufacture, no more than 5 percent gypsum is added to the clinker (Ch. 8 — Portland Cement).

Mississippi Remodeling

Key Concepts

Masonry fireplaces (IBC 2021, Chapter 21) - Firebox minimum depth: 20 inches (508 mm) — Section 2111.7. - Firebox back and sidewalls: 8 inches of solid masonry each, including the lining, where a firebrick lining not less than 2 inches thick is provided — Section 2111.6. - Hearth minimum thickness: 4 inches; hearth extensions have a separate, lesser minimum of 2 inches — Section 2111.10.1. - Hearth extension: where the opening is 6 sq ft or larger, extend not less than 20 inches in front and not less than 12 inches beyond each side of the opening — Section 2111.11. - Lintel over fireplace opening: noncombustible, with 4 inches minimum bearing on each end — Section 2111.8. - Smoke chamber: corbeled masonry walls not more than 30 degrees from vertical; prefabricated linings or rolled/sloped walls permitted up to 45 degrees — Section 2111.9.1. - Combustible mantels/trim may be placed directly…

Roofing: Residential and Commercial

Key Concepts

Minimum slopes by covering - Asphalt shingles: 2:12 minimum; from 2:12 up to 4:12, double underlayment is required (IBC 1507.2.1, 1507.2.2). Must be fastened to solidly sheathed decks (1507.2.1). - Clay and concrete tile: 2½:12 minimum; 2½:12 to 4:12 requires double underlayment (1507.3.2). - Slate shingles: 4:12 or greater (1507.7.2). Wood shingles: 3:12 (1507.8.2, Table 1507.8). Wood shakes: 4:12 (1507.9.2, Table 1507.8). - Mineral-surfaced roll roofing: not below 1:12 (1507.6.2). Built-up roofs: design slope not less than ¼:12, except coal-tar built-up at ⅛:12 (1507.10.1). Modified bitumen: ¼:12 (1507.11.1). - Textbook categories: high slope = 4-in-12 or greater (standard for strip shingles); a low-slope roof is 2½/12 or less (Carpentry & Building Construction, Sec. 22.1; Sec. 17.2, p. 483).