Đội ngũ PrepPass · Đối chiếu với CSLB — California Contractors State License Board · Quy trình kiểm tra
Người kiểm duyệt Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — kiểm tra)
Miễn phí · in được · không cần đăng ký
Phiếu Ôn Cấp Tốc Kỳ Thi CSLB Trade — General Building (B) (2026)
Phiếu Ôn Cấp Tốc miễn phí, in được cho kỳ thi CSLB Trade — General Building (B): 141 điểm trọng tâm nhất, chia thành 5 phần theo các lĩnh vực nội dung của kỳ thi, mỗi phần kèm trọng số đã công bố.
- Miễn phí đọc, in và giữ lại — không cần đăng ký, không cần email, không có tường phí.
- 141 trong 141 điểm có dẫn nguồn quy định gốc.
- In trực tiếp từ trình duyệt (Ctrl-P, hoặc Cmd-P trên Mac) — thanh điều hướng, các nút và liên kết không xuất hiện trong bản in.
- 700 câu hỏi luyện tập CSLB Trade — General Building (B) miễn phí trên cùng nội dung, câu nào cũng có giải thích.
- Cập nhật lần cuối: tháng 8 năm 2026.
Học theo trình tự?
Trong sách hướng dẫn CSLB Class B — General Building (Trade Exam): 400 câu luyện tập, câu nào cũng có lời giải, gồm một đề hỗn hợp và năm bộ theo chương. Luyện tập ở đây vẫn miễn phí.
Core Trades
30% của kỳ thi- Minimum residential strength
- Concrete for foundations, slabs, and footings in most residential work is specified at a minimum of 2,500 psi at 28 days, with exposed or severe-weather locations often requiring 3,000 psi or more.· 2025 CA Residential Code Table R402.2
- Rebar cover
- Reinforcing steel cast against and permanently exposed to earth needs about 3 inches of concrete cover; formed surfaces exposed to weather typically need 1.5 to 2 inches.· 2025 CA Building Code Chapter 19
- Anchor bolt embedment
- Sill-plate anchor bolts are commonly 1/2-inch diameter embedded at least 7 inches into the concrete, spaced no more than 6 feet apart with a bolt within 12 inches of each plate end.· 2025 CA Residential Code R403.1.6
- Curing
- Fresh concrete must be kept moist and protected for several days—commonly a minimum of 3 to 7 days—so it reaches design strength rather than drying and cracking prematurely.· 2025 CA Building Code Chapter 19
- Footing depth below frost/grade
- Footings must bear on undisturbed soil and extend below the frost line for the jurisdiction, with a minimum footing depth typically no less than 12 inches below undisturbed ground.· 2025 CA Residential Code R403.1.4
- GFCI locations
- Ground-fault circuit-interrupter protection is required for receptacles serving kitchens, bathrooms, garages, outdoors, crawl spaces, and areas near water.· 2025 CA Electrical Code Article 210
- AFCI protection
- Arc-fault circuit-interrupter protection is required for most 120-volt branch circuits serving living areas such as bedrooms, living rooms, and hallways.· 2025 CA Electrical Code Article 210
- Kitchen counter receptacles
- Counter receptacles are placed so no point along the counter is more than 24 inches from an outlet, meaning spacing generally does not exceed 4 feet apart.· 2025 CA Electrical Code Article 210
- Working clearance
- A clear working space at least 30 inches wide and 36 inches deep must be kept in front of electrical panels and equipment for safe service.· 2025 CA Electrical Code Article 110
- Conductor color/grounding
- Grounded (neutral) conductors are white or gray and equipment grounding conductors are green or bare; the system must be bonded to a grounding electrode such as a ground rod or the building steel.· 2025 CA Electrical Code Article 250
- Drain slope
- Horizontal drainage piping must slope at least 1/4 inch per foot. Only building drain piping 4 inches or larger may use 1/8 inch per foot, where 1/4 is impractical and the AHJ approves first.· 2025 CA Plumbing Code Chapter 7
- Trap seal
- Every plumbing fixture needs a water-seal trap with a seal depth of 2 to 4 inches to block sewer gas, and each trap must be vented.· 2025 CA Plumbing Code Chapter 10
- Cleanouts
- Cleanouts are provided at changes of direction and at intervals along drain lines so blockages can be cleared, and they must remain accessible.· 2025 CA Plumbing Code Chapter 7
- Water heater relief valve
- A temperature and pressure (T&P) relief valve is required on water heaters. Its discharge pipe runs full size with no valves, points down, and discharges by gravity through an air gap into the drainage system or outside the building; outdoors it ends 6 to 24 inches above the ground.· 2025 CA Plumbing Code §608.5
- Backflow protection
- Potable water must be protected from cross-connections using air gaps or backflow preventers so contaminated water cannot siphon back into the supply.· 2025 CA Plumbing Code Chapter 6
- Combustion air
- Fuel-burning appliances in confined spaces require openings to supply combustion air—commonly two openings, one high and one low, sized to the appliance's total input rating.· 2025 CA Mechanical Code Chapter 7
- Duct sealing and R-value
- Ducts must be sealed against leakage and insulated—supply and return ducts in unconditioned space typically need at least R-6 to R-8 insulation.· 2025 CA Energy Code (Title 24 Part 6)
- Condensate drainage
- Cooling coils and condensing furnaces need a condensate drain, and a secondary drain or drain pan is required where overflow could damage the building.· 2025 CA Mechanical Code Chapter 3
- Flue clearance and termination
- Vents and flues must maintain listed clearances to combustibles and terminate above the roof, generally at least 2 feet above any part of the building within 10 feet.· 2025 CA Mechanical Code Chapter 8
- Ventilation air
- Dwellings require mechanical ventilation for indoor air quality, with whole-house ventilation rates set by the Energy Code and local exhaust in kitchens and bathrooms.· 2025 CA Energy Code (Title 24 Part 6)
- Minimum slope for shingles
- Asphalt shingles are limited to roofs with a slope of 2:12 or greater; from 2:12 up to 4:12 a double-layer underlayment is required.· 2025 CA Building Code Chapter 15
- Underlayment
- At least one layer of approved underlayment is installed under roofing, with an ice-barrier or self-adhering membrane used where required by climate.· 2025 CA Building Code Chapter 15
- Flashing
- Flashing is required at valleys, wall intersections, chimneys, and penetrations to direct water away from joints and prevent leaks.· 2025 CA Building Code Chapter 15
- Class A fire rating in WUI
- In wildland-urban interface fire areas, roof coverings must be Class A rated and assemblies must resist ember intrusion at eaves and valleys.· 2025 CA Building Code Chapter 7A
- Fastening
- Shingles are fastened with the number of nails specified by the manufacturer—commonly 4 to 6 nails per shingle—increased in high-wind areas.· 2025 CA Building Code Chapter 15
- Wall and ceiling R-values
- Minimum insulation levels depend on climate zone; typical wood-framed walls require around R-13 to R-21 and ceilings/attics around R-30 to R-49.· 2025 CA Energy Code (Title 24 Part 6)
- Water-resistive barrier
- Exterior walls need a water-resistive barrier behind the cladding. Behind stucco, outside the IECC marine climate zones, one option is two layers of 10-minute Grade D paper and the other is 60-minute Grade D paper separated from the stucco; IECC marine zones also need drainage (CRC R703.7.3).· 2025 CA Residential Code R703.7.3
- Flashing integration
- Window and door flashing must lap over the layer below in shingle fashion so water drains outward, and pan flashing is used at sills.· 2025 CA Building Code Chapter 14
- Air sealing
- The building envelope must be sealed at penetrations, top and bottom plates, and joints to limit air leakage, verified during Energy Code compliance.· 2025 CA Energy Code (Title 24 Part 6)
- Attic and crawl ventilation
- Vented attics generally require net free ventilation area of 1/150 of the area, reducible to 1/300 only when both conditions are met: 40 to 50 percent of the area is in upper vents and, in Climate Zones 6, 7 and 8, a Class I or II vapor retarder is installed. Crawl spaces are 1/150 under their own section, R408.2.· 2025 CA Residential Code R806.2, R408.2
- Drainage away from foundation
- The finished grade must slope away from the building—commonly a minimum fall of 6 inches within the first 10 feet, roughly a 5 percent slope.· 2025 CA Residential Code R401.3
- Compaction
- Structural fill supporting foundations is compacted in lifts to a specified relative compaction, often 90 percent or more, verified by soils testing.· 2025 CA Building Code Chapter 18
- Cut and fill slopes
- Permanent cut and fill slopes are generally no steeper than 2 horizontal to 1 vertical unless a soils report justifies a steeper slope.· 2025 CA Building Code Appendix J
- Foundation setback from slopes
- Foundations near descending slopes must be set back from the slope face—commonly one-third of the slope height, up to a defined maximum—to keep bearing stable.· 2025 CA Residential Code R403.1.7
- Property lines and setbacks
- Before excavation, verify property corners, easements, and required yard setbacks against the approved site plan to avoid encroachment.· Local zoning ordinance
Framing & Structural
20% của kỳ thi- Stud spacing
- Wall studs are commonly spaced 16 inches on center; 24-inch spacing is allowed for many non-bearing and some bearing walls when stud size and load permit.· 2025 CA Residential Code R602.3
- Double top plate
- Bearing walls use a double top plate with laps offset at least 24 inches to tie the framing together; single top plates require aligned framing above.· 2025 CA Residential Code R602.3.2
- Header sizing
- Openings in bearing walls require headers sized to the span—longer spans need deeper or built-up members, verified against span tables.· 2025 CA Residential Code R602.7
- Joist bearing
- Floor joists need at least 1.5 inches of bearing on wood or metal and 3 inches on masonry, and must be supported at ends or lapped over beams.· 2025 CA Residential Code R502.6
- Notching and boring limits
- Notches and bored holes in joists and studs are limited in size and location—for example, holes in joists cannot exceed one-third the depth and must stay clear of edges.· 2025 CA Residential Code R502.8
- Rafter-ceiling joist tie
- Rafters that are not supported by a structural ridge must be tied by ceiling joists or rafter ties near the top plate to resist outward thrust.· 2025 CA Residential Code R802.4
- Truss alteration
- Prefabricated trusses must not be cut, notched, or drilled except as shown on the truss design drawing; field changes require engineering approval.· 2025 CA Residential Code R802.10
- Ridge board
- A non-structural ridge board must be at least as deep as the cut end of the rafter to provide full bearing at the peak.· 2025 CA Residential Code R802.3
- Rafter/ceiling connection
- Rafters and ceiling joists are fastened to the top plate and to each other with the nailing specified in the fastening schedule to carry uplift and thrust.· 2025 CA Residential Code Table R602.3(1)
- Truss bracing
- Permanent and temporary bracing must be installed per the truss design so the roof system resists lateral movement during and after erection.· 2025 CA Residential Code R802.10
- Continuous load path
- Framing must be tied together with connectors from roof to foundation so seismic and wind forces have an unbroken path to the ground.· 2025 CA Residential Code R602.10
- Hold-downs at shear walls
- Hold-down anchors resist overturning at the ends of braced and shear walls, bolting the framing to the foundation or the floor below.· 2025 CA Residential Code R602.10
- Shear wall nailing
- Wood structural panel shear walls use edge nailing at specified spacings—such as 6, 4, 3, or 2 inches on center—to develop their rated shear capacity.· 2025 CA Building Code Chapter 23
- Sill anchorage and plate washers
- Sill plates are anchored with bolts fitted with 3-inch-by-3-inch plate washers so the plate cannot pull off the foundation during shaking.· 2025 CA Residential Code R602.11
- Cripple wall bracing
- Short cripple walls between the foundation and floor must be braced with structural panels to prevent collapse in an earthquake, a common retrofit item.· 2025 CA Residential Code R602.9
- Weep screed
- Stucco walls require a weep screed at the foundation plate line, placed at least 4 inches above earth or 2 inches above paved surfaces to drain moisture.· 2025 CA Building Code Chapter 25
- Three-coat stucco thickness
- Traditional three-coat stucco over lath is applied to a nominal 7/8-inch total thickness in scratch, brown, and finish coats.· 2025 CA Building Code Chapter 25
- Lath and barrier
- Metal lath is fastened over the water-resistive barrier on wood-based sheathing, for example two layers of Grade D paper where that option applies, so the stucco has a mechanical key and the wall can drain.· 2025 CA Building Code Chapter 25
- Siding fasteners and laps
- Horizontal siding is lapped and nailed to studs or sheathing with corrosion-resistant fasteners long enough to penetrate framing per the manufacturer.· 2025 CA Residential Code R703
- Clearance to grade
- Wood siding and other cladding must be kept a minimum clearance above finished grade—commonly 6 inches—to avoid moisture wicking and decay.· 2025 CA Residential Code R304
- Deck live load
- Residential decks are designed for a live load of at least 40 pounds per square foot plus dead load, and the ledger connection must carry that load.· 2025 CA Residential Code R507
- Ledger attachment
- Deck ledgers must be fastened to the building with lag screws or through-bolts—not nails—and flashed to keep water out of the band joist.· 2025 CA Residential Code R507.9
- Guard height
- Guards are required where a walking surface is more than 30 inches above grade and must be at least 42 inches high on decks.· 2025 CA Residential Code R321
- Stair rise and run
- Stair risers are a maximum of 7.75 inches and treads a minimum of 10 inches, with variation between steps limited to 3/8 inch.· 2025 CA Residential Code R318.7
- Handrail height and graspability
- Handrails are 34 to 38 inches above the tread nosings and must be graspable, required on stairs with four or more risers.· 2025 CA Residential Code R318.7.8, R320.2
Safety
15% của kỳ thi- Trigger height
- In California construction, fall protection is generally required when workers are exposed to falls of more than 7 1/2 feet, and guardrails at open sides 7 1/2 feet or more above the level below. Some operations have a lower trigger, such as 6 feet for residential framing under §1716.2.· Cal-OSHA Title 8 §1670(a), §1621(a)
- Guardrail height
- Standard guardrails have a top rail about 42 inches high with a midrail, and toeboards where objects could fall on people below.· Cal-OSHA Title 8 §1620
- Personal fall arrest
- A personal fall arrest system uses a full-body harness, lanyard, and anchor rated to arrest a fall and limit forces on the worker.· Cal-OSHA Title 8 §1670
- Head and eye protection
- Hard hats are required where objects may fall and eye protection where flying particles, chemicals, or radiation are present.· Cal-OSHA Title 8 §1514
- Floor and roof openings
- Openings that a person could fall through must be guarded by covers, railings, or fall arrest and clearly marked.· Cal-OSHA Title 8 §1632
- Protective system depth
- Trenches 5 feet or deeper require a protective system—sloping, shoring, or shielding—unless made entirely in stable rock.· Cal-OSHA Title 8 §1541.1
- Cal-OSHA excavation permit
- A permit is required before excavating a trench 5 feet or more deep into which a person must enter.· Cal-OSHA Title 8 §341
- Spoil setback
- Excavated soil and materials must be kept at least 2 feet back from the trench edge to keep loads off the walls.· Cal-OSHA Title 8 §1541.1
- Access and egress
- Trenches 4 feet or deeper need a ladder, ramp, or stairway within 25 feet of any worker for quick escape.· Cal-OSHA Title 8 §1541
- Competent person inspection
- A competent person must inspect the excavation daily and after any event—like rain—that could increase collapse hazards.· Cal-OSHA Title 8 §1541
- Scaffold capacity
- Scaffolds and their components must support their own weight plus at least 4 times the maximum intended load without failure.· Cal-OSHA Title 8 §1637
- Scaffold fall protection
- Fall protection—guardrails or personal fall arrest—is required on scaffold platforms more than 7.5 feet above a lower level in California.· Cal-OSHA Title 8 §1637
- Ladder extension
- A ladder used to access an upper landing must extend at least 3 feet above the landing surface and be secured against movement.· Cal-OSHA Title 8 §1675
- Ladder angle
- A straight or extension ladder is set at about a 4-to-1 pitch—one foot of base for every four feet of working height.· Cal-OSHA Title 8 §1675
- Scaffold planking
- Platform planks must be scaffold-grade, fully planked, and secured so they cannot slip or tip when loaded.· Cal-OSHA Title 8 §1637
- Temporary traffic control zones
- Work zones are laid out with advance warning, transition (tapers), activity, and termination areas per the California MUTCD.· California MUTCD 2026, Part 6
- High-visibility apparel
- Workers exposed to traffic or equipment must wear high-visibility safety apparel meeting the required performance class.· Cal-OSHA Title 8 §1598
- Flagger procedures
- Flaggers must be trained, use standard STOP/SLOW paddles, and stand where they are visible and can escape errant vehicles.· California MUTCD 2026, Part 6
- Channelizing devices
- Cones, drums, and barricades guide traffic and must be spaced and sized so drivers can follow the intended path.· California MUTCD 2026, Part 6
- Taper length
- Merging tapers are sized to the posted speed—higher speeds require longer tapers so drivers have time to merge safely.· California MUTCD 2026, Part 6
- Permit threshold
- Construction disturbing one acre or more of soil must obtain coverage under the state Construction General Permit and prepare a SWPPP.· CA Construction General Permit
- Erosion and sediment controls
- Best management practices—such as fiber rolls, silt fences, and inlet protection—must keep sediment from leaving the site.· CA Construction General Permit
- Stabilized construction entrance
- A rock or stabilized entrance is used to knock mud off tires so vehicles do not track sediment onto public streets.· CA Construction General Permit
- Material and waste management
- Concrete washout, fuels, and other materials must be contained so they cannot reach storm drains or waterways.· CA Construction General Permit
- Inspection and records
- Stormwater controls must be inspected on a schedule and before and after storm events, with records kept on site.· CA Construction General Permit
Finish Trades
20% của kỳ thi- Board thickness by spacing
- 1/2-inch gypsum board is standard for walls with studs 16 inches on center; for ceilings that must resist sag, use 5/8-inch board or 1/2-inch sag-resistant board, especially where framing is 24 inches on center.· 2025 CA Residential Code §R702.3
- Fastener spacing
- Along framing, nails are typically spaced no more than 7 inches apart on ceilings and 8 inches on walls; screws no more than 12 inches on ceilings and 16 inches on walls. Screws hold better and are required by many fire-rated assemblies.· 2025 CA Residential Code Table R702.3.5
- No paper-faced gypsum in wet areas
- Behind tile in tubs and showers use cement board, fiber-cement, or an approved glass-mat backer, not regular gypsum, so moisture cannot rot the paper facing.· 2025 CA Residential Code §R702.4.2
- Minimum ceiling height
- Habitable rooms and hallways must have a finished ceiling height of at least 7 feet; bathrooms, toilet rooms and laundry rooms at least 6 feet 8 inches. Measure after furring and finish are applied, not to the framing.· 2025 CA Residential Code §R313.1
- Plaster coats
- Traditional cement plaster over metal lath is applied in three coats (scratch, brown, finish) to a nominal 7/8-inch thickness on exterior lath, and each coat must be allowed to cure before the next.· 2025 CA Residential Code §R703.7
- Waterproof shower pan
- Shower floors require a water-resistant, sloped receptor with a membrane turned up the walls; the finished floor must slope uniformly toward the drain at not less than 1/8 inch and not more than 1/2 inch per foot.· 2025 CA Plumbing Code §408.6
- Backer board in wet walls
- Wall tile in showers and tub surrounds must be set over cement, fiber-cement, or glass-mat backer board with a moisture barrier or bonded waterproof membrane behind it.· 2025 CA Residential Code §R702.4.2
- Floor deflection limit
- Tile floors need a stiff subfloor; ceramic tile is generally limited to L/360 deflection and natural stone to L/720, or the grout and tile will crack.· Industry standard (TCNA / ANSI); confirm with tile manufacturer
- Movement joints
- Provide soft (caulked) movement joints where tile meets dissimilar materials and at changes of plane, such as inside corners and floor-to-wall transitions, to absorb expansion.· Industry standard (TCNA EJ171)
- Test slab moisture first
- Before gluing resilient or wood flooring to concrete, verify the slab moisture is within the flooring manufacturer's limit, commonly measured by relative humidity probe (often a maximum near 75-80% RH).· Industry standard (ASTM F2170); follow manufacturer
- Acclimate wood flooring
- Solid and engineered wood must sit in the conditioned space for several days so its moisture content matches the home before installation, or it will cup or gap seasonally.· Industry standard (NWFA); follow manufacturer
- Expansion gap
- Leave a perimeter expansion gap (commonly about 3/8 to 1/2 inch) around wood and laminate floating floors, hidden by base or shoe molding, so the field can move.· Manufacturer installation instructions
- Underlayment and vapor retarder
- Over concrete or crawlspace framing, install the vapor retarder or underlayment the manufacturer specifies; skipping it voids the warranty and invites moisture damage.· Manufacturer installation instructions
- Low-VOC architectural coatings
- Interior architectural coatings must meet CALGreen and California Air Resources Board VOC limits, such as roughly 50 g/L for flat and 100 g/L for nonflat paints; keep the product data sheets for inspection.· 2025 CALGreen §4.504.2
- Surface preparation
- Clean, dull, and dry the surface before coating; remove efflorescence, grease, and loose material, because paint bonds to a sound substrate, not to contamination.· Manufacturer / industry standard (SSPC / PDCA)
- Prime bare and repaired surfaces
- New drywall, bare wood, and patched areas need a primer or sealer so the finish coat builds evenly and does not flash or peel.· Manufacturer application instructions
- Coverage and coats
- Estimate about 350-400 square feet of coverage per gallon per coat on smooth surfaces; textured or porous surfaces cover less, and most jobs need two finish coats.· Manufacturer coverage data
- Lead-safe work
- In pre-1978 housing, disturbing paint requires certified lead-safe (RRP) practices to contain and clean up dust that may contain lead.· Federal EPA RRP Rule (40 CFR 745)
- NAAWS grade ladder
- NAAWS defines Economy (basic, lowest cost), Custom (the most common commercial grade), and Premium (highest quality, tightest tolerances and best material matching); Custom is the default if the spec is silent.· North American Architectural Woodwork Standards (NAAWS)
- Cabinet blocking and anchoring
- Install solid backing or hit the studs when anchoring wall cabinets; screws must reach framing, because a loaded upper cabinet can pull out of drywall alone.· Manufacturer / industry standard
- Countertop overhang support
- Unsupported stone or quartz counter overhangs beyond roughly 10-12 inches need brackets or corbels to prevent cracking at the seam.· Industry standard (fabricator)
- Moisture and finish
- Millwork should be delivered and installed only after the building is dry and conditioned, so panels and joints do not swell, shrink, or telegraph.· NAAWS; manufacturer
- Safety (tempered) glazing locations
- Use tempered or laminated safety glass in hazardous locations: in and next to doors, in tub and shower enclosures where the glass bottom is within 60 inches of the standing surface, and in large panes near the floor.· 2025 CA Residential Code §R324.4
- Emergency escape opening size
- Every sleeping room needs an egress window with at least 5.7 square feet of clear opening (5.0 at grade level), a minimum 24-inch clear height, and a minimum 20-inch clear width.· 2025 CA Residential Code §R319.2.1, §R319.2.2
- Egress sill height
- The bottom of the emergency escape opening may be no more than 44 inches above the finished floor so an occupant can climb out.· 2025 CA Residential Code §R319.2.3
- Energy U-factor limit
- Prescriptive fenestration is limited to a maximum U-factor of 0.27 or 0.30 depending on climate zone and, in most zones, a solar heat gain coefficient (SHGC) of 0.23; verify the NFRC label matches the plans.· 2025 CA Energy Code (Title 24, Part 6) Table 150.1-A
- Skylight flashing and rating
- Skylights must be flashed per the manufacturer and meet the same energy label requirements; unit skylights carry an NFRC U-factor and SHGC just like windows.· 2025 CA Residential Code §R324.6 / Energy Code
- Positive drainage away from building
- Finished grade must slope away from the foundation, commonly at least 6 inches of fall within the first 10 feet, so water does not pool against the structure.· 2025 CA Residential Code §R401.3
- Water-efficient landscape (MWELO)
- New and rehabilitated landscapes above the size threshold must meet the state Model Water Efficient Landscape Ordinance water budget, adopted through CALGreen.· 2025 CALGreen §4.304 / MWELO
- Irrigation controllers and sensors
- Automatic irrigation systems generally require weather- or soil-moisture-based smart controllers and rain shutoff so the system does not run during rain.· 23 CCR §493.2.2(e)(5) (MWELO), through 2025 CALGreen §4.304.1
- Backflow protection
- Irrigation connections to the potable supply need an approved backflow prevention device so fertilizer or pond water cannot siphon back into drinking water.· 2025 CA Plumbing Code (backflow provisions)
Planning & Estimating
15% của kỳ thi- Order of precedence
- When documents conflict, specifications generally govern over drawings, larger-scale details govern over smaller-scale, and written (figured) dimensions govern over scaled measurements.· Standard contract convention (e.g., AIA A201)
- Never scale for critical dimensions
- Use the written dimensions on the plans; printing and copying distort scale, so a ruler on the sheet is only an approximation.· Industry standard
- Shop drawings are submittals, not design
- Shop drawings show how a sub will build a component and must be reviewed and approved before fabrication, but reviewing them does not transfer design responsibility to the reviewer.· Standard contract convention (AIA A201)
- Read the schedules
- Door, window, finish, and equipment schedules on the drawings carry critical sizing and model data that the plan views only reference by mark.· Industry standard
- Concrete volume in cubic yards
- Cubic yards = (length ft x width ft x thickness ft) / 27. Example: a slab 30 ft x 20 ft x 4 in (0.333 ft) = 199.8 cu ft / 27 = 7.4 cu yd; order about 8 cu yd to add roughly 5-10% waste.· Estimating formula
- Board feet of lumber
- Board feet = (nominal thickness in x nominal width in x length ft) / 12. Example: a 2 x 10 that is 16 ft long = (2 x 10 x 16) / 12 = 26.7 board feet.· Estimating formula
- Roofing squares
- One roofing square = 100 square feet of roof area. Squares = total roof area (sq ft) / 100. Example: a 2,400 sq ft roof = 24 squares, plus waste for starter, hip, ridge, and valleys.· Estimating formula
- Drywall sheet count
- Sheets = total wall/ceiling area (sq ft) / area per sheet; a 4 ft x 8 ft sheet covers 32 sq ft. Example: 1,600 sq ft of wall / 32 = 50 sheets before waste.· Estimating formula
- Always add waste and markup
- After the net takeoff, add a waste factor (commonly 5-15% by material), then layer labor, equipment, overhead, and profit to reach the bid price.· Estimating practice
- Identify the governing code edition
- California enforces the current Title 24 family (Building, Residential, Energy, CALGreen, and more) plus any stricter local amendments; confirm the edition in effect at permit issuance.· 2025 California Building Standards Code (Title 24)
- Permits before covering work
- Structural, electrical, plumbing, and mechanical work generally requires a permit, and inspections must occur before the work is concealed.· 2025 CA Residential Code §R105 / §R109
- Accessibility on applicable projects
- Commercial and public-facing projects must meet CBC Chapter 11B accessibility requirements; pricing must include compliant routes, restrooms, and hardware.· 2025 CA Building Code Chapter 11B
- Price implied scope
- Notes like 'match existing' or 'per code' still cost money; read the general notes and specifications so implied work is not left out of the bid.· Estimating practice
- Inspect before concealment
- Foundation/rebar, rough framing, rough electrical, plumbing, and mechanical must pass inspection before insulation, drywall, or backfill hides them.· 2025 CA Residential Code §R109
- Required inspection stages
- Typical hold points are footing/foundation, under-slab utilities, rough-in (framing/MEP), insulation, and final; each must be requested and approved in sequence.· 2025 CA Residential Code §R109.1
- Correct then re-inspect
- A failed inspection generates a correction notice; the contractor fixes the item and calls for re-inspection rather than proceeding to cover it.· 2025 CA Residential Code §R109
- Keep approved plans on site
- The stamped, approved plan set and the permit card must be available on the job for the inspector, with inspection results signed off in order.· 2025 CA Residential Code §R106.3.1
- Respect the critical path
- The critical path is the chain of tasks that sets the shortest possible project duration; a delay on any critical-path task delays the whole job, so protect and monitor it.· Scheduling principle (CPM)
- Sequence trades logically
- Rough-in (framing and MEP) precedes insulation and drywall; wet trades finish and dry before flooring; paint before final trim and fixtures, so no trade damages another's work.· Construction sequencing practice
- Coordinate long-lead items early
- Items with long fabrication or delivery times (custom windows, cabinets, switchgear) must be submitted and ordered early so they do not stall the critical path.· Project management practice
- Hold coordination meetings
- Regular meetings with subs, owner, and design team surface conflicts (clash between duct and beam, missing dimension) before they become costly field problems.· Project management practice
- RFI to clarify, not to change
- An RFI is a written question to the designer or owner to resolve an ambiguity or conflict; it documents the answer but does not by itself authorize extra cost.· Contract administration practice
- Change orders in writing first
- Any change to scope, price, or time should be approved in a signed written change order before the work is performed, so payment is not left to memory or goodwill.· Contract administration practice
- Home improvement change order rules
- On California home improvement contracts, changes to the work must be documented in a written change order signed by both parties, consistent with the contract's requirements.· CA Business & Professions Code (contractor law)
- Track cost and schedule impact
- Each change order should state the added or deducted cost and any change to the completion date, and update the contract sum and schedule accordingly.· Contract administration practice
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Đọc qua đề cương không giống với nhớ được khi vào phòng thi. Luyện các câu hỏi CSLB Trade — General Building (B) miễn phí để tìm ra những lĩnh vực bạn hay sai, rồi làm một đề mô phỏng có tính giờ.
Tài liệu hỗ trợ học tập, không thay thế tài liệu chính thức — luôn kiểm tra quy định hiện hành với CSLB — California Contractors State License Board.