Who has the video tutorial of Tianzheng Structure

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Key points for review of construction drawing design of existing building reconstruction I. Key points for review of fire protection design of existing building reconstruction 1. Existing building reconstruction shall meet the requirements of current fire protection technical standards. Under one of the following circumstances, the original building fire protection facility system can be partially used: (1) It cannot be realized due to building structure (such as fire pool, roof fire water tank, fan room, smoke exhaust duct, fire elevator, etc.); (2) The reconstruction of concealed works (such as electromechanical system pipe network and control line outside the reconstruction area) cannot be realized; (3) The reconstruction scope is small, and the reconstruction area is not more than 3000 square meters and not more than 1/3 of the total building area of the single building.