Home›Knowledge›IMC Chapter 10 — Boilers, Water Heaters, Pressure Vessels

📋 Codecodesmechanical

IMC Chapter 10 — Boilers, Water Heaters, Pressure Vessels

Updated Mar 26, 2026

Boiler rooms, clearances, T&P relief valves, expansion tanks, combustion air requirements.

IMC Ch10: T&P valve to 6in of floor (no threads, no reduction, max 30ft, no traps). Expansion tank on closed systems. Combustion air: 50 cu.in./1000 BTU from outdoors (confined space). Seismic bracing per ASCE 7. CO detection per code.

TAGS

IMC boiler water-heater T&P-valve combustion-air

DETAILS

code year

2024

code system

IMC

code section

Chapter 10

RELATED KNOWLEDGE

IBC 903.2.1 — Group A Occupancies (Sprinkler Requirements)

Automatic sprinkler system required throughout buildings with Group A occupancy where fire area exceeds 5,000 square feet, or overall building area exceeds 12,000 square feet, or occupant load of the fire area exceeds 300.

IBC 903.2.7 — Group M Occupancies (Retail Sprinkler Requirements)

Automatic sprinkler system required in Group M (mercantile) occupancies where fire area exceeds 12,000 square feet or building is more than three stories above grade.

IBC 903.2.11.3 — Buildings 55 Feet or More in Height

Automatic sprinkler system required throughout buildings with a floor level having an occupant load of 30 or more that is located 55 feet or more above the lowest level of fire department vehicle access.

IBC 1015.1 — Exit and Exit Access Doorways Required

Two exits or exit access doorways required from any space where occupant load exceeds the table values. Spaces with occupant load exceeding 500 require a minimum of 3 exits. Spaces exceeding 1,000 require 4 exits.

IBC 1017.2 — Exit Access Travel Distance

Maximum travel distance from any point in a building to an exit shall not exceed 200 feet unsprinklered or 250 feet sprinklered for most occupancies. Specific occupancies have modified limits.

IBC Table 601 — Fire-Resistance Rating Requirements

Specifies minimum fire-resistance ratings for structural elements based on construction type (Type I through V). Type IA requires 3-hour rated structural frame, 2-hour floors, and 1.5-hour roof.

← Back to Knowledge Garden