The submission drawings will be prepared by the project’s architect, in accordance with; and including the fire safety requirements that we have outlined. This will be a Rational or a Deemed-to-Satisfy Design, meeting the safety requirements laid out by the National Building Regulations.
Draw up Bill of Quantities (BOQ)
With our experience and knowledge of the construction industry, we will draw up an accurate and cost-effective BOQ for distribution to the tendering contractors.
South African National Standard (SANS)
Fire Audit Covers the Following:
S.A.B.S 0400 1990 Part T Fire protection
SANS 1475 2005 Servicing of Hand Held Fire equipment
SANS 10105 2005 Use and control of Firefighting Equipment
S.A.B.S 0287 2000 Automatic Sprinkler Systems
S.A.B.S 1128 2000 Hydrants
SANS 1186 2003 Symbolic Safety Signage
SANS 10139 2005 Fire Detection and Alarm Systems
SANS 543 2004 Fire Hose reels
Act No.85 1993 Occupational Health & Safety
NFPA.1 2009 National Fire Prevention Association
BY LAWS Local By Law compliance to provisioning of fire safety equipment & features
Our Fire Audit Covers the Following:
Inspection of the site
Identification of all fire equipment on site
Reporting on additional fire equipment required as a safety requirement and by legislation
Reporting on any fire services issues within the building, including access and fire hazards
Reporting on any issues you need to rectify, to enable submission of yearly Fire Statements
Supplying costs for any additional installations required
Reporting on maintenance and service requirements for all fire equipment
Wet Pipe Systems
By a wide margin, wet pipe sprinkler systems are installed more often than all other types of fire sprinkler systems. They also are the most reliable, because they are simple, with the only operating components being the automatic sprinklers and (commonly, but not always) the automatic alarm check valve. An automatic water supply provides water under pressure to the system piping. All of the piping is filled with water, until sufficient heat is applied, causing one or more sprinklers to fuse (open), the automatic sprinklers prevent the water from being discharged.
Operation – When an automatic sprinkler is exposed to sufficient heat, the heat sensitive element (fusible link) releases, allowing water to flow from that sprinkler. Sprinklers are manufactured to react to a range of temperatures. Only sprinklers subjected to a temperature at or above their specific temperature rating will operate.
Dry Pipe Systems
Dry pipe systems can only be used (by regulation) in spaces in which the ambient temperature may be cold enough to freeze the water in a wet pipe system, rendering the system inoperable. Dry pipe systems are most often used in unheated buildings, in outside canopies attached to heated buildings (in which a wet pipe system would be provided), or in refrigerated coolers. Dry pipe systems are the second most common sprinkler system type. Water is not present in the piping until the system operates. The piping is pressurised with air, at a “maintenance” pressure which is relatively low compared with the water supply pressure. To prevent the larger water supply pressure from forcing water into the piping, the design of the dry pipe valve (a specialised type of check valve) intentionally includes a larger valve clapper area exposed to the maintenance air pressure, as compared to the water pressure.
Operation – when one or more of the automatic sprinklers is exposed to sufficient heat, it operates, allowing the maintenance air to vent from that sprinkler. Each sprinkler operates individually as the air pressure in the piping drops, the pressure differential across the dry pipe valve changes, allowing water to enter the piping system. Water flow from sprinklers needed to control the fire is delayed until the air is vented from the sprinklers. For this reason, dry pipe systems will only provide a slight delay prior to water discharge while the air in the piping is released prior to the water filling the pipe.
“Deluge” systems are systems that have open sprinklers, i.e. the heat sensing operating element is removed during installation so that all sprinklers connected to the water piping system are open. These systems are used for special hazards where rapid fire spread is a concern, as they provide a simultaneous application of water over the entire hazard. Water is not present in the piping until the system operates. Because the sprinkler offices are open, the piping is at ambient air pressure. To prevent the water supply pressure from forcing water into the piping, a deluge valve is used in the water supply connection, which is a mechanically latched valve. It is a non-resetting valve and stays open once tripped.
Pre-action sprinkler systems are specialised for use in locations where accidental activation is undesired, such as in museums with rare artworks, manuscripts, or books. Pre-action systems are hybrids of wet, dry and deluge systems, depending on the exact system goal.
There are two sub-types of pre-action systems: single interlock, and double interlock.
The operation of single interlock systems is similar to dry systems except that these systems require that a supervised event (typically the activation of a heat or smoke detector) takes place prior to the action of water introduction into the system piping due to opening of the pre-action valve (which is a mechanically latched valve). Once the fire is detected by the fire alarm system, the system is essentially converted from a dry system into a wet system. Or, if an automatic sprinkler operated prior to the fire being detected by the fire alarm system, water will be allowed into the piping and will discharge water from the sprinkler.
The operation of double interlock systems is similar to deluge systems except that automatic sprinklers are used. These systems require that both a preceding and supervised event (typically the activation of a heat or smoke detector) and an automatic sprinkler activation take place prior the action of water introduction into the system piping. There is also a little-used variation known as Non-Interlock.
Foam Water Systems
A foam water sprinkler system is a special application system, discharging a mixture of water and low expansion foam concentrate, resulting in a foam spray from the sprinkler. These systems are usually used with special hazard occupancies associated with high challenge fires, such as flammable liquids and airport hangars. The operation is as described above, depending on the system type into which the foam is injected
Water Spray Systems
Operationally identical to deluge systems, water spray systems utilise pipe and nozzle configurations that protect unique hazards, such as an electrical transformer containing flammable liquid. The spray nozzle and pipe setup are designed around the often three-dimensional nature of the hazard.