Explanation 1: (1) Round steel supports are generally suitable for middle steel columns, combined with tie rods to form a support system;.
(2) The double-sided welding of round steel and steel plate is completed in the factory, and the on-site connection with the steel column is connected by single hole hinge bolts;.
(3) The flower basket screws are tensioned and installed on adjacent rows of steel columns. After calibration, they are tightened using tools. The tightening standard is to tighten the round steel in a straight state, with no downward deflection in the line shape;.
1. The support between columns is installed synchronously with the steel columns, and as a stable unit, adjacent steel columns, steel beams, and other structures are installed sequentially;.
2. The angle steel support is connected to the connecting plate using high-strength bolts. After tightening, the flange of the angle steel is welded to the connecting plate, and the weld specifications are corner welds;.
1. Portal supports are divided into truss type and beam type, and the cross-section can use angle steel, channel steel, round pipe, and H-shaped steel. The selection factors mainly include requirements and structural stress requirements according to specific situations;.
2. The support should be assembled on the ground and installed as a whole, synchronized with the installation of steel columns. It should be used as the starting unit in the overall construction, with good stability;.
3. For the convenience of on-site construction, the connection nodes should be connected by one end bolted and one end welded, and pure bolted connection should not be used. During the connection construction process, attention should be paid to the inspection of node welds..
1. The installation time of the horizontal support on the roof is synchronized with the installation of the roof truss beam to increase structural stability;.
2. The round steel support is tensioned with basket screws, and after tensioning, the support line is straight and the deflection should not exceed 2mm;.
3. Round steel supports can be constructed using steel beam web plate nodes, with specific nodes referring to drawing set 04sg518-2..
1. The installation of horizontal supports on the roof should be synchronized with the roof truss beams to increase structural stability. During installation, the lifting point should be set at one-third of the position to avoid downward deflection of the angle steel;.
2. The angle steel and connecting plate are connected by bolts. If the design adopts bolted welding connection, it is recommended to supplement the calculation sheet and change it to bolted connection..
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