Steel grating, steel grating installation clips are generally used in steel grating installation projects. In special cases, screws and electric welding can also be used for installation and grafting. Due to the saving of materials and light weight, steel grating can be made into Any shape, such as triangle, rectangle, parallelogram, pentagram, circle, fan, trapezoid, is enough to prove the flexibility of steel grille. A new type of green building material.
Drilling with bolts
Prepare electric drills, wrenches, power supplies, pay attention to safety when working at heights, wear safety helmets, safety ropes and other emergency equipment bolts. When installing bolts, they should be received according to the required quantity, specification and model of the day. Throwing, littering. The mounting components are first fixed with temporary mounting bolts. The number of temporary bolts and punching nails penetrated into each node is determined by calculation of the possible load during installation, and must meet the following requirements:
(1) Not less than 1/3 of the total number of installations;
(2) There should be no less than two temporary bolts; the number of punching nails should not be more than 30% of the number of temporary bolts;
(3) Do not use high-strength bolts as temporary bolts during installation to prevent changes in torque coefficient caused by damage to the thread;
(4) The installation of high-strength bolts should be carried out after the center position of the structural member is adjusted. During the installation process, it is strictly forbidden to forcibly penetrate, and the bolt threads must not be damaged or contaminated with dirt, so as to prevent the torque coefficient from changing.
The penetration direction is subject to the convenience of construction and installation, but strive to be consistent; when assembling the torsion-shear type high-strength bolt connection pair, the side of the nut with the round table surface should face the chamfered side of the washer.
(5) When assembling the large hexagon head high-strength bolt connection pair, the washer should be installed on the side of the bolt head and the nut side, and the chamfered side of the washer under the bolt head should face the bolt head.
(6) At the same time, the friction surface of the component must be kept dry, and it is not allowed to work in rain and snow.
(7) The tightening of torsion shear type high-strength bolts is divided into initial tightening and final tightening. The initial and final tightening torque values are subject to the above calculated values. The high-strength bolts after initial tightening are marked with colors on the nuts.
Then use a special wrench for final tightening until the torx head at the end of the bolt is unscrewed; for individual high-strength torsional shear bolts that cannot be finalized with a special wrench, the torque coefficient is 0.13 times the final torque value for calculation.
(8) The tightening sequence of the high-strength bolts in the initial and final tightening is from the center of the threaded body group to the outside in sequence; and the initial and final tightening are completed within the same day.
(9) The final tightening inspection of the torsion-shear type high-strength bolts is qualified by visually inspecting that the torx head at the tail of the bolt is unscrewed.
https://www.topsteelgrating.com/
