【Joint Study*】【Civil Engineering Version 20160313】
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This post was last edited by hesonchang214 on 2016-3-23 08:02. Reward for participation: 2 wealth points. Reward for correct answer: 9 wealth. The roof waterproofing grades are currently classified as ( ). A、Grade I B、Grade II C、Grade III D、Grade IV Correct answer: ABCD
The roof waterproofing grades are currently classified as (D). A、Grade I B、Grade II C、Grade III D、Grade IV
The waterproofing grade and protection requirements for abcd roofs should meet the following standards: Grade I, applicable to buildings that are particularly important or have special requirements regarding waterproofing. The reasonable service life of the waterproofing layer is 25 years. Suitable materials for the waterproofing layer include synthetic polymer waterproof membranes, polymer-modified asphalt waterproof membranes, metal sheets, synthetic polymer waterproof coatings, and fine aggregate concrete. Three or more layers of waterproofing protection are required； 2. For Class II important buildings and high-rise buildings, the reasonable service life of the waterproofing system is 15 years. Suitable materials for the waterproof layer include polymer-modified asphalt waterproofing membranes, synthetic polymer waterproofing membranes, metal sheets, synthetic polymer waterproof coatings, polymer-modified asphalt waterproof coatings, fine aggregate concrete, flat tiles, and asphalt shingles. The requirement is to have two layers of waterproofing ； 3. For ordinary Class III buildings, the reasonable service life of the waterproof layer is 10 years. Suitable materials for the waterproof layer include three-fabric-four-oil asphalt waterproof membranes, polymer-modified asphalt waterproof membranes, synthetic polymer waterproof membranes, metal sheets, polymer-modified asphalt coatings, synthetic polymer coatings, fine aggregate concrete, flat tiles, and asphalt shingles ； 4. For Class IV non-permanent buildings, the reasonable service life of the waterproof layer is 5 years. Materials that can be used for the waterproof layer include two-fabric-three-oil asphalt waterproofing membranes and polymer-modified asphalt waterproof coatings; a single layer of waterproofing is sufficient to meet the requirements.
The roof waterproofing grades are currently classified as (ABCD). A、Grade I B、Grade II C、Grade III D、Grade IV
The roof waterproofing grades are currently classified as (A, B, C, D). A、Grade I B、Grade II C、Grade III D、Grade IV