Los Angeles Dept of Building & Safety (LADBS)
Los Angeles, CA
Avg Review
28d
Rejection Rate
65%
Skill Files
5
Status
High Risk
Type I Hood Ventilation
CMC 507Type I hoods required over all cooking appliances producing grease-laden vapors. Minimum exhaust rate: 400 CFM per linear foot of hood (heavy duty). Makeup air required: 80-100% of exhaust volume.
Examiner Note: This office consistently rejects plans missing fire damper detail callouts on duct sections crossing fire-rated walls. Always show detail on sheet M-1.
Common rejection: Missing fire damper details at rated wall penetrations
Correction: Add fire damper detail callout on sheet M-1 at each duct penetration through fire-rated assembly per CMC 507.2.1
Fire Suppression (NFPA 96 + UL 300)
NFPA 96 / UL 300Ansul or equivalent UL 300 listed system required for all Type I hoods. Automatic fuel shutoff upon suppression activation. Manual pull station within 10-20 feet of egress path.
Examiner Note: Ansul nozzle locations must be shown on BOTH the mechanical plan AND the fire protection plan. Discrepancies between sheets = automatic correction.
Common rejection: Ansul nozzle coverage area not documented
Correction: Show Ansul nozzle locations on both M-1 and FP-1 sheets. Document nozzle coverage area per UL 300 listing for each hood section.
Plumbing — Commercial Kitchen
CPC / UPC Table 10-4Floor drains: one per 400 SF of kitchen area minimum. Grease interceptor required: sized per UPC Table 10-4. 3-compartment sink required in each bay. Handwash sink within 25 feet of any food prep surface.
Examiner Note: Grease duct construction detail (16-gauge welded steel per NFPA 96) must be called out on mechanical drawings, not just referenced in specs.
Common rejection: Grease interceptor sizing calculation not shown on plumbing plan
Correction: Add grease interceptor sizing calculation per UPC Table 10-4 on sheet P-1. Show fixture count, flow rate, and interceptor capacity.
Electrical — Kitchen Circuits
NEC 422.33 / CECDedicated circuits for each major appliance. GFCI protection within 6 feet of any water source. Emergency disconnect for all kitchen equipment (NEC 422.33). Minimum 200A service per bay.
Common rejection: GFCI protection not called out on kitchen circuits
Correction: Add GFCI symbol and note on all outlets within 6 feet of water sources per NEC 210.8(B). Show emergency disconnect location on E-1.
Makeup Air Unit
CMC 507.2Makeup air unit required when exhaust exceeds 400 CFM. Must be shown on roof plan. Makeup air cannot exceed 10°F below room temperature.
Common rejection: Makeup air unit not shown on roof plan
Correction: Add makeup air unit to roof plan (sheet A-2/M-2). Show duct routing, unit specifications, and CFM capacity matching exhaust system.