So high, how people are safe to enter into the way of what is more
Tower crane is the most significant tower crane center to the hook to reach the farthest distance, the specific is the car in the tower arm can run long distance. The working range of the tower crane is the radius of the tower crane, and the maximum distance from the crane to the center of rotation should meet the needs of the construction plane. The lifting height of the tower shall not be less than the total height of the building plus the height of the components, sling and safe operation (usually 2 to 3 m), and shall meet the scaffolding, derrick or other barrier material beyond the top of the building Generally not less than 1m) of the maximum beyond the height required. Tower crane in the minimum amplitude from the maximum weight, with the increase in the amplitude of the corresponding reduction in weight. Therefore, in a variety of amplitude are rated from the weight. Different amplitude and the corresponding weight together, can be drawn into a crane performance curve. Rated weight * distance from the center of the trolley = rated lifting moment. The balance of the general tower crane arm is greater than the maximum torque, the crane itself is a boom and balance arm unbalanced steel structure, this imbalance is based on the balance. Since the torque generated by the balance arm is large, that is, in the case of no hanging matter, plus the maximum wind load torque is the tower crane overturning moment. Rectangular basic check, the basic moment is the diagonal direction of the largest, in order to reinforcement. The maximum lifting torque is obtained without considering the wind load, theoretically, to achieve a very dangerous. The lifting weight of the tower crane should include the lifting material, spreader and rigging, etc. acting on the lifting crane hook crane all the weight. The lifting torque of the crane is generally controlled at 75% of its rated lifting torque to ensure safe operation and to extend its service life.
Single layer of color steel plate: length * width * thickness * 7.85 * ton price + profit double color steel plate: length * width * thickness * 7.85 * ton price * 2 + sandwich material price + profit specific look material, you can Specifically to consult
Hello there You can Google cattle shield Xugong official website, which has the price and product display, I suggest you choose Niu Dun Xugong waterproof products and standardized construction team, Niu Dun Xugong is the best quality waterproof listed companies
