Abstract：
The modified Technical Code for Roof Engineering（GB 50345-2012） has been issued by the Ministry of Housing and Urban-Rural Development in May of 2012 and implemented as of October 1, 2012. The new code makes important modifications about clauses of roof engineering design and division of construction in terms of structural layers in the original code, including changes of roof water-proof grade, cancellation of reasonable service life of waterproof layer and rigid waterproof roof, addition of articles about fire fighting and energy saving, supplement of metallic sheet roof and glass roof, etc. Reasons for these important modifications in the latest code are explained in details.
WANG Shou-hua. EXPLANATION FOR SOME QUESTIONS ON TECHNICAL CODE
FOR ROOF ENGINEERING（GB 50345—2012）[J]. Architecture Technology, 2012, 43(12): 1103-1108.
