Industrial Coating

STARCOAT CRC(2 Hour Fire Rated Duct Work System)

STARCOAT CRC Fire Rated Duct Work System is constructed from galvanized sheet steel manufactured to the DW144, HVCA or SMACNA standard, then degreased and sprayed with STARCOAT CRC coating which is a specially formulated water based compound. This contains selected mineral filters in a low permeability elastomeric binder to a thickness of approximately 700 to 900 micron to give a finished product which has been successfully tested fire conditions in excess of 2 hours duration. Ductwork is produced in sections and is assembled on site utilizing tested class.Gaskets & sealants (CHEMICAL 32-17). STARCOAT CRC:The unique properties of STARCOAT CRC has enabled us to design a low density, highly durable material which accommodates induced stress arising from extreme and varying conditions et Climatic Moisture and Structural Loading Variations and the effect of a thermal shock during a fire. The completed system has been tested to BS 476(Part 20 & 24) - 1987 and also up to temperature of 1131°C

ductwork can either be constructed in flanged lengths of duct, which are then bolted together to make a run of ducting, or in panel form. This construction is especially useful for ducts of large cross section and can be used on any size of duct up to 25 X 3M.

• Tested for up to 2 hours Stability, Integrity & insulation to BS 476 Part 208241987 and for Ventilation Fire Duct Smoke Duct Kitchen Extract ductwork
• Total flexibility in the design and construction of the duct.
• Can be sent to site "flat packed ready to bolt up

The panels are delivered to site pre-coated on the bottle take with STARCOAT CRC and are then boited together Incorporating caso se strip to form the reguired duct cross section

It can confidently be specified and installed for:

• Smoke extract duct
• car park extract duct
• Kitchen extract duct
• Stair pressurization system duct

One of the mout important factors taken into consideration when designing and contructing abdng eflective compartimentation to fire spread out the building Under normal drcumatances compartmentation Is maintained by fire dampers with in ductwork systems. However under certain circumstances fire dampers should not be used and the duct work its must provide the same levels of fire resistance that afforded by the compartment wall or floor.

Ductwork systems which do not normally contain fire dampers are as follows:

• Smoke Extract Ducts
• Pressurization Duct
• Car Park Extract Ducts
• Kitchen Extract Ducts

In general terms, any ductwork system that is intended to operate or cannot therefore utilize fire dampers will require a fire rating.

Ventilation systems and applications which have special or operational effect under fire conditions are as follows

Smoke extraction is the evacuation of products of combustion, such as smoke s from a building which could otherwise accessibility and simplehuman functions Smoke extraction faclitates the escape of the building Occupants and assists fire ghternin locating the seat of the fire extinguishing itin situations where he dearance by natural ventilation through windows or other openings may be difficulties in large or deep basements or inches building seit hout opening windows, duc ctwork is required to convey the smoke to a sutable output from the building in cases where the natural buoyancy of the combustion products is not adequate to ensure the required smoke extraction rate through the duct work and when we need It may also benerary total duct its as part of the smoke extraction scheme in order to provide the replacement in the ductwork incorporated in a smoke extraction ystem is wholly contained within the fire compartment, it must be capable of testing the anticipated temperature generated during the development of a fire s 476 (Part 206241987 also requires duct which is intended for smoke extract should retain at least of its cross sectional area within the fire compartment if the duct work penetrates the Furry barrier it must also be capable of providing the same period of fire resistance.

Car Park which require mechanical ventilation mast have and independent extractionntems because of the literature of the extracted air Due to the recited with mostract systems and their maten accordance with of paste items would be treated as wil we under fire con B5476Part 202411987 Fire damper should not be Servicing car Parks.

Non-domestic kitchens are required to have separate and independent extraction systems, because of the polluted nature of the extracted air. Fire dampers should not be installed in extraction ductwork serving kitchens; any ductwork penetrating fire resisting barriers should be fire resistant.hazard as combustible deposits such as grease are likely to accumulate Kitchen extract ductwork presents a particular on internal surfaces. A fire in an adjacent compartment through which the ductwork passes could therefore lead to ignition of these deposits which may continue kitchen occupants. For this reason consideration should Finally. where possible access doors for cleaning at here to search through the ductwork system, possibly prejudicing the safety of the be given to the insulation performance of kitchen extract ducts.distances not exceeding 3m is recommended.

Pressionism restrictions near by meaning the air at higher pressure than those in adjacent arras Rapplies particuly to protected starn lobes corndon and fire fighting hasten do men, make thin the two Creating the pressurization with thet ductwork to prevent A pressuration tystem naspecial form of mechanical ventilation system The must be maintained for the duration et a fee fire damperi tanet be used Anductors prefer in tailor Should there be fire resistant.