1. What is the waterproof rating?
Waterproof grade The grade of waterproof protection function, including building waterproof grade and instrument waterproof and dustproof grade. Mainly according to the nature, importance, functional requirements, structural characteristics and durability of the waterproof layer.
When classifying waterproof grades, the following conditions shall be considered comprehensively:
(1) will cause huge losses until personal injury;
② Leakage will cause great economic losses;
③ Leakage will cause general economic losses;
(4) leakage will affect the appearance.
Second, the building waterproof
The waterproof grade of a building should be determined by the designer according to the nature, importance and functional requirements of the building, and then the waterproof material and structural design should be selected according to the waterproof grade and the durability of the waterproof layer.
With the implementation of the new edition of Technical Specification for Waterproofing of Underground Engineering (GB50 108-2008) and the new edition of Technical Specification for Roofing Engineering (GB 50345-20 12) in 2008, the waterproof grade of building engineering can be divided into underground engineering and roofing engineering.
Underground engineering
Underground engineering waterproof level is divided into four levels.
Level one? Water seepage is not allowed, and there is no wet stain on the surface of the structure.
Level two? Water leakage is not allowed, and there may be a small amount of wet stains on the surface of the structure.
Industrial and civil buildings: the total wetted area is not more than 0. 1% of the total waterproof area, and the single wetted area is not more than 0. 1㎡, arbitrarily 100? ㎡ waterproof surface? No more than 2 products.
Other underground works: the total wet dyed area is not more than 0.2% of the waterproof area, and the single wet dyed area is not more than 0.2? ㎡, any 100? ㎡ The waterproof area shall not exceed 3 places; Among them, tunnel engineering also requires that the average water seepage is not more than 0.05L? /? (㎡ d), any 100? The water seepage on the waterproof area ㎡ is not more than 0. 15L? /? (㎡.d)
Level three? There are few water leakage points, and cable flow and mud leakage are not allowed.
The area of a single wet spot is not more than 0.3? M2, the water leakage of a single water leakage point is not more than 2.5L/d, which is arbitrary 100? M2 waterproof area shall not exceed 7 places.
Level 4? There are water leakage points, and cable flow and mud leakage are not allowed.
The average water leakage of the whole project shall not exceed 2l/(m2). D), which is arbitrary 100? The average water leakage of m2 waterproof area is not more than 4L/(m2.d).
Roofing engineering
Roof waterproof grade and fortification requirements
Waterproof grade? Architecture? Fortification requirements
Level one? Waterproof fortification of important buildings and high-rise buildings
Level two? General architecture? Waterproof facilities
Three, building waterproof grade division
Divide buildings into the following four categories:
One type of building is particularly important, such as a museum? Libraries, memorial halls, exhibition halls, archives and particularly important laboratories.
Waterproof and durable life? 25; Waterproof fortification requirements: more than three fortifications.
Class II buildings are important buildings. Such as terminal buildings, station waiting buildings, star-rated hotels, theaters, hospitals, shopping malls, warehouses for storing important substances, etc. Waterproof and durable life? 15; Waterproof fortification requirements: secondary fortification.
The three types of buildings are ordinary industrial and civil buildings. Such as office buildings, houses, factories, school buildings and general warehouses. Waterproof and durable life? 10; Waterproof fortification requirements: one fortification.
Most of the four types of buildings are buildings to be demolished within three to five years or buildings with low waterproof requirements. Such as work sheds, building component processing sheds, automobile and bicycle sheds, warehouses, etc. Waterproof and durable life? 5; Waterproof fortification requirements: one fortification.
The classification of building waterproofing reflects the difference between important projects and general projects. The durability years are different, and the reliability guarantee rate of waterproofing is different, so the fortification level, the performance and cost of selected materials are also different. The classification of waterproof grades makes the design of building waterproof engineering more reasonable, scientific and economical. The above is the related content of building waterproof classification introduced by Bian Xiao. Want to know more, please continue to pay attention to the decoration of Tuba Rabbit!