What Does A Service Riser Mean In Construction?
What Does A Service Riser Mean In Construction?
A service riser in construction is a vertical pipe, culvert, shaft, or other structure that rises up in a vertical direction. Service risers are used to supply water within buildings for fire-fighting purposes and can be either dry or wet.
Dry risers do not contain water when they are not being used but are charged with water by fire service pumping appliances, while wet risers are permanently charged with water.
Service risers can also refer to electrical, mechanical, and telecommunication horizontal passages, closets, vaults, or other pathways in the building. Risers can be made from a variety of materials such as plastic, copper, brass, and galvanized steel.
The lifespan of risers depends on the material used and warning signs that it is time to replace them include signs of leaks on walls and staining appearing on walls.
What Is A Service Riser Used For?
A service riser is a type of roof penetration used to provide a route for mechanical and electrical services to pass through a concrete roof.
They are commonly used in conjunction with rooftop plant decks, and they contain ducts, pipes, or cable trays Service risers can also be used for open service risers, lift risers, riser voids, and riser shafts, as well as wet and dry risers mechanical and electrical systems.
What Are The Different Types Of Risers?
There are three main types of audience risers: telescopic, retractable, and demountable. Telescopic risers are typically used in black box theatres, performance halls, stadiums, arenas, and temporary outdoor events.
They fold out and can be adjusted to different tread depths and heights depending on the specific needs of the client’s chair selection for their event. Retractable risers are similar to telescopic risers but they are manually operated instead of automated.
Demountable risers are portable and can be completely disassembled and transported to different facilities entirely.
Telescopic risers are often used for corporate, theatrical, and sporting events as they allow all audience members to focus fully on the stage or sports field without having to crane their necks or strain their eyes.
MAXAM+™ Telescopic Platforms from Hussey Seating Company are expertly engineered to meet the seating needs of a wide variety of applications and venues.
How Big Should A Service Riser Be?
Dry riser pipework typically comes in two different sizes: 4 inches and 6 inches. The minimum size pipe for Class I and III standpipes is 4 inches (100 mm), while a partially sprinklered building requires a 6-inch (150 mm) pipe.
For risers or mains that are 4 inches (100 mm) and larger, a 2-inch valve is required. For risers or mains that are 2 1/2 inches (65 mm), 3 inches (80 mm), or 3 1/2 inches (90 mm) in size, a 1 1/4 inch (32 mm) valve is required.
For risers or mains that are 2 inches (50 mm) or smaller, a 3/4 inch (19 mm) valve is required.
What Are The Service Riser Requirements?
Overhead service conductors must maintain a minimum clearance of 8 ft above the surface of a roof for a minimum distance of 3 ft in all directions, and they must be at least 3 ft from doors, porches, balconies, ladders, stairs, fire escapes, or similar locations.
The minimum capacity of the overhead service entrance conductors provided by the customer is 100, and they should be insulated per NEC requirements.
