Flameshield Technical | Kent Ductwork

Design Criteria

Due care and consideration must be made to establish that the fire rated system complies with all of the requirements for which it is being applied. The correct type of system along with the required ratings must be specified, there might be occasions when expert advice is required.

Kent Ductwork Limited are able to offer expert advice when considering the following factors:

Define the type of system required:

Fire Inside - Type B Duct
Fire Outside - Type A Duct

Define the type of ductwork required:

Ventilation/Kitchen Extract/Smoke Extract/Car Park Extract/Stair Pressurisation.

Determine the period of fire rating.

Stability
Integrity
Insulation

Determine the static pressure requirements.

Low Pressure - Class A - 500 Pa positive or negative.
Medium Pressure - Class B - 1000 Pa positive or negative.
High Pressure - Class C - 2000Pa positive or negative.

Ductwork Construction

Suitable for use as a Type A (Fire Outside) and Type B (Fire Inside) fire rated ductwork systems for periods up to 240 minutes Stability and Integrity, 120 minutes insulation.
Suitable for use as a Smoke Extract system for periods up to 120 minutes Stability, Integrity and Insulation.
Suitable for Kitchen Extract, Car Park Extract, Stair Pressurisation Systems, General Ventilation and Dishwasher Extract.
Suitable for fire rated ductwork Air Leakage up to 2000 Pa Class C.

Compliance with the following Specification and Standards.

LPCB Certified.
BS 476 Part 24: 1987
BS 5588 Part 9.
DW 144
DW 172
Approved Document B1 (means of escape) and B3 (internal fire spread structure).