সরাসরি প্রধান সামগ্রীতে চলে যান

An assembly of fittings, pipe, flexible pipe, and/or couplings that permits movement in all directions to accommodate seismic differential movement across building seismic separation joints.


An assembly of fittings, pipe, flexible pipe, and/or couplings that permits movement in all directions to accommodate seismic differential movement across building seismic separation joints.
Seismic separation assemblies include traditional assemblies as shown in Figure (1) and seismic loops as shown in Figure (2).
Seismic separation assembly according to NFPA 13 -2019 edition
Figure (1)
Seismic separation assembly according to NFPA 13 -2019 edition
Figure (2)
The extent of permitted movement should be sufficient to accommodate calculated differential motions during earthquakes. In lieu of calculations, permitted movement can be made at least twice the actual separations, at right angles to the separation as well as parallel to it.
An approved seismic separation assembly shall be installed where sprinkler piping, regardless of size, crosses building seismic separation joints at ground level and above.
Seismic separation assemblies shall consist of flexible fittings or flexible piping so as to allow movement sufficient to accommodate closing of the separation, opening of the separation to twice its normal size, and movement relative to the separation in the other two dimensions in an amount equal to the separation distance.
The seismic separation assembly shall include a fourway brace upstream and downstream within 6 ft (1.8 m) of the seismic separation assembly. Each four-way brace should be attached to the building structure on opposite sides of the seismic separation joint.
Bracing shall not be attached to the seismic separation assembly.
Fig:-02

Fig:-01

মন্তব্যসমূহ

একটি মন্তব্য পোস্ট করুন

এই ব্লগটি থেকে জনপ্রিয় পোস্টগুলি

WHAT IS FIRE RATED GYPSUM DRYWALL?

Gypsum is approximately 21 percent by weight chemically combined water which greatly contributes to its effectiveness as a fire resistive barrier. When gypsum drywall is exposed to fire, the water is slowly released as steam, effectively retarding heat transmission. Fire rated gypsum drywall is more fire resistant because it contains glass fiber reinforcement and other additives within its specially formulated gypsum core to help it hold up longer to a fire exposure. Fire  rated drywall is referred to as “Type X” and must be third-party certified by an independent testing and listing agency such as UL (Underwriters Laboratories Inc.) and ULC (Underwriters’ Laboratories of Canada) to meet the fire performance requirements prescribed in the ASTM C1396 (CAN/CSA-A82.27) Standard Specification for Gypsum Board. Types of Fire Rated Gypsum: Type X fire rated gypsum drywall that is 5/8 -inch (15.9mm) thick and installed on each side of nominal 2-inch x 4-inch (38x89mm) wood
১টি মন্তব্য
আরও পড়ুন

Pipe Schedule Method for Firefighting Sprinkler System

Pipe Schedule Method for Firefighting Sprinkler System                                     Pipe Schedule Method for Firefighting Sprinkler System  The water demand for firefighting sprinkler systems shall be determined by either the pipe schedule method or the hydraulic calculation method, in this article we will discuss the pipe schedule method. What is pipe schedule system?! According to NFPA 13, Pipe Schedule System is defined as sprinkler system in which the pipe sizing is selected from a schedule that is determined by the occupancy classification and in which a given number of sprinklers are allowed to be supplied from specific sizes of pipe. Where can we use pipe schedule method?! New systems of 465 m2 or less. Additions or modifications to existing pipe schedule systems. Classification of occupancies according to hazard NFPA 13 classifies the occupancies according to the quantity and combustibility of contents, the expected rates of heat rel
১টি মন্তব্য
আরও পড়ুন

Fire Fighting Systems and Equipment in Buildings

General Fire Fighting Equipment Fire fighting systems and equipment vary depending on the age, size, use and type of building construction. A building may contain some or all of the following features: fire extinguishers fire hose reels fire hydrant systems automatic sprinkler systems. Fire extinguishers Fire extinguishers are provided for a 'first attack' fire fighting measure, generally undertaken by the occupants of the building before the fire service arrives. It is important that occupants are familiar with which extinguisher type to use on which fire. Most fires start as a small fire and may be extinguished if the correct type and amount of extinguishing agent is applied whilst the fire is small and controllable. The principle fire extinguisher types currently available include: Extinguishing Agent     Principle Use Water wood and paper fires - not electrical Foam flammable liquid fires - not electrical Carbon dioxide electrical fires Dry Che
১টি মন্তব্য
আরও পড়ুন