2.2 meters.
Oil smoke shafts and air shafts on the unnatural layer are not counted in the building area, but the elevator machine room on the roof is a natural layer when oil smoke sinks and air. the shafts are attached to the exterior wall of the roof elevator machine room. The surface area of the building is also not calculated.
According to the new national standard - "Real Estate Measurement Code", the building area is not calculated in 10 cases. The 10 situations include: 1. Mezzanines, inserts, technical floors and cellars and semi-basements with a floor height of less than 2.20 meters. 2. Components, accessories, decorative columns, decorative glass curtain walls, columns, legs, steps and columnless canopies that highlight the walls of the house. 3. There are no air corridors between houses. 4. The roof of the house, the balcony, the garden sur the sky and the swimming pool. 5. The operating platform, loading platform and space platform in the building as well as the space platform for placing crates and tanks in the building. 6. The lower floors of arcades and crossing buildings are used for the passage of roads and alleys. 7. Homes that use access bridges, overpasses, elevated roads and road surfaces as roof structures. 8. Prefabricated houses. 9. Expansion joints between houses that are not connected inside the house. 10. It is understood that the new real estate measurement standards will allow error ranges of ±0.26, ±0.6 and ±1.4 according to different accuracy levels, while the old standard allows measurement error area of 1.4.
How to carry out the noise reduction project in the computer room?
No. Sound-absorbing cotton is used in the generator roomand sound-absorbing equipment will be used in the air ducts entering and leaving the room. The generator room is designed with a sound-absorbing ceiling. The ceiling adopts special sound-absorbing keels and is covered with 50mm thick high-quality sound-absorbing cotton as sound-absorbing material. Aluminum loop ceilings with a perforation rate >20% are used as surface protection sound-absorbing materials. The wall absorbs sound. In order to prevent sound from penetrating the wall and transmitting to the outside world, it is necessary to install a sound absorber on the wall. The sound absorber is made of 50 mm thick sound-absorbing cotton. The exterior wall uses an aluminum. loop perforated ceiling as sound-absorbing material of the wall. After the sound insulation treatment of the computer room, the ventilation and heat dissipation problem in the computer room needs to be solved. The air inlet must bebe placed on the same straight line as the generator and the air exhaust outlet. The air inlet must be equipped with a resistive piece silencer. Since the pressure loss at the air inlet is also within the allowable range, the air volume entering and leaving the engine room can be naturally balanced, and the ventilation and heat dissipation effect is obvious. If sound-absorbing cotton is used in the air inlet duct, the heat dissipation effect will be affected.
It is best to find a professional manufacturer to complete the computer room noise reduction project. Relatively speaking, Losay Acoustics is more professional. This manufacturer has specialized in noise reduction and sound insulation projects for computer rooms for many years. has relatively good experience in this field. There are many, and the R&D team is also very professionalnelle and can provide reliable computer room soundproofing projects. The computer room sound insulation projects we have here are carried out by this manufacturer. Their soundproofing projects should be more comprehensive and can effectively help eliminate noise in the computer room, the price of the services provided by this manufacturer is relatively reasonable.