Combustible construction

Indoors Cool, well-ventilated area Non-combustible construction Segregated from other flammables/reactants ... 

Particulates Chemical processes Fuel combustion Construction Incineration processes Motor vehicles Nuisance Adverse health effects Reduced visibility Deposition on buildings... 

Interior partition walls should be noncombustible construction, such as fabricated of drywall (gypsum board) on metal studs or equivalent. Wood or plywood wall paneling or other combustible construction materials should not be used. The use of wallpaper or other thin wall coverings is acceptable. 

Cooling towers can be either the victim of an outside ignition source or they can be the culprit causing propagation of a fire to other nearby processing, storage, or utility operations or facilities. In fire protection terms, they may present an "exposure to" or they may suffer "exposure from" other facilities or hazards. Some of the situations and events that have led to fires in cooling towers of combustible construction are ... 

Provided if the boiier/thermai oxidizer is installed in a room or building of combustible construction or the building or room contains significant quantities of combustible materials. 

III Primarily combustible construction Subclassified into two categories where columns and interior bearing walls are 1 or 0 hour rated Exterior bearing wall construction is noncombustible and 2 hour rated Floor and roof construction is 1 or 0 hour rated... 

IV Combustible construction commonly referred to as heavy timber, mill or plank-on-timber Exterior and interior bearing walls are of noncombustible construction and 2 hour rated Interior structural members, floors and roofs are solid or laminated wood and meet minimum dimensional criteria... 

Combustible Construction consists of materials which will ignite and burn. Combining combustible materials with otherwise noncombustible materials may result in an overall combustible composite assembly. Type III (211) Type III (200) Type IV (2HH) Type V (111) Type V (000)... 

NFPA 55,6.6.2 4.2.4 Overhead cover for outdoor storage areas of compressed gases shall be of non-combustible construction, open on three sides and shall not be considered indoor storage. 

NFPA 430,2.12 4.4.3 Combustible construction materials that could come into contact with oxidizers shall be coated with a compatible material to prevent their impregnation with the oxidizers. 

All tanks must be supported on non-combustible stands with a fire resistance of at least 4h. All metal parts of the storage installation should be bonded together and earthed to avoid the build up of static charges which could cause sparks. The maximum allowable value of resistance to earth is 10 Q. The integrity of the earth must be tested on a regular basis. Weather protection may be appropriate and this can be achieved by the use of a dutch-barn type structure of lightweight non-combustible construction with at least two open sides. 

Spray booths must be installed so that all portions are readily accessible for cleaning. A clear space of not less than 3 feet on all sides must be kept free from storage or combustible construction. Space within the spray booth on the downstream and upstream sides of filters must be protected with approved automatic sprinklers. There shall be no open flame- or spark-producing equipment present in any spraying area or within 20 feet thereof, unless separated by a partition. Electrical wiring and equipment not subject to deposits of combustible residues, but located in a spraying area, must be explosion proof... 

Cleaning. Spray booth shall be so installed that all portions are readily accessible for cleaning. A clear space of not less than 3 feet (0.912 m) on all sides shall be kept free from storage or combustible construction. 

Discharge clearance. Unless the spray booth exhaust duct terminal is from a water-wash spray booth, the terminal discharge point shall be not less than 6 feet from any combustible exterior wall or roof nor discharge in the direction of any combustible construction or unprotected opening in any noncombustible exterior wall within 25 feet (7.6 m). 

Temporary buildings, when located within another building or structure, shall be of either noncombustible construction or of combustible construction having a fire resistance of not less than 1 hour. 

Combustible walls— Where cutting or welding is done near walls, partitions, ceilings, or roofs of combustible construction, fire-resistant shields or guards must be provided to prevent ignition. 

Sprinklers for Combustible Tools. Heads should be loeated at the transition pieces of any tool of combustible construction or handling flammable or combustible liquids. This is regardless of the size of the duct. 

Sheltered Combustible Areas. Many tools will have sheltered areas of combustible construction handling flammable and combustible liquids. These areas should be protected with automatic sprinklers or a fixed extinguishing system. 

Workstations. All workstations must be installed with fire sprinkler protection. Workstations constructed of combustible materials containing HPMs must contain a sprinkler head within four feet of the exhaust duct connection. Sprinkler coverage of the horizontal surface at any workstation shall not be obstructed. NFPA 318, in addition to requiring automatic sprinkler protection of the horizontal surface, requires sprinkler protection in the exhaust transition piece of combustible workstations (Paragraph 2-1.2.8.1). A sprinkler shall be installed within the exhaust duct cormection of workstations of combustible construction. 

Protection (non-combustible or purpose-made blankets, drapes or screen) has been provided for walls, partitions and ceilings of combustible construction or surface finish... 

Walls, partitions and ceilings of combustible construction or surface finish. 

Class A - complete non-combustible construction, i.e. elements of structure, floors, walls. Supporting structure of brick or concrete Class B - traditional construction, i.e. non-combustible walls with combustible floors Class C - combustible construction, i.e. timber floors and walls. 

Figure 9.9 Class A - complete non-combustible construction, I.e. concrete or brick floors and walls...

Because of their light, combustible construction, these buildings should be placed at least twice the distance from an operating plant as a conventional control building. However, separation between them need not exceed around 60 meters. 

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