Factory directly supply EN 14399-3 and 7 Structural Bolt Set for Proloading for Myanmar Factory

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1.Steel roof before installation, civil engineering, manufacturing, and installation of examination and acceptance of the three parties to civil capital for the following: check the anchor bolt size, elevation, pitch, thread length and so on is in the range of allowable tolerances, span is consistent with the steel structure size, whether conform with drawing requirements. After the acceptance of the handover, before being steel roof installation, to ensure the correctness of the installation location, elevation, span, etc.

2. The steel roof truss should use the same ground pattern or mold, and adopts the block iron positioning assembly, to ensure the camber and span size are correct. The pedestal links the embedded, should be in the roof truss welding, after correction according to the size of its span position assembled to each other, to get accurate span, height and ease of installation. To facilitate the installation adjusting span size, support for embedded connection, can not with roof assembly first when producing, application of temporary bolts attached to the roof, for on site installation according to the size of the roof span and its position to connect. before hoisting, should carefully check the roof truss, corrected for deformation of parts, the guarantee span size again after lifting.

3.Strictly controlling the size of the component production, installation deviation. Hoisting, should use proper lifting process, such as cross level support length is longer, the stiffness is poorer, application round wooden reinforcement, lifting point location should be reasonable, keep as far as possible in a plane, the force center of gravity in the in-plane uniform stress, in order to prevent the bending, torsion deformation. When installation should make level support slightly connected to the roof truss arch is slightly greater than the level state, can eliminate the down warping. Large deviation such as connection position when not in place, shall not adopt any pull tool use outside force through the connection, so as not to make the roof bottom chord lateral bending or make the level of support too much on the arch or down warping, and to make the fitting to save a large internal stress. Horizontal support with a temporary bolted, good correction should be immediately after welding.

4.The bolt hole hole system should be set template, ensure correct size position. Before the installation, should bolt hole and installation surface finishing. Pay attention to eliminate small steel parts assembled deviation, to prevent accumulation. Bolts should be consistent. Steel structure components each side should have at least two mounting holes, in order to reduce steel members caused by itself down warping hole deviation, generally USES steel punch primary make fitting up and down hole.

5.Column, roof installation after correction, with temporary fixed position welding, by another group of welders should be immediately full welding are permanently fixed, and strengthen inspection, in order to prevent the individual node leakage weld length, height is not enough, when supported by external force, the connection node weld damage, and make the pillar and roof unstability.

6.Steel structure installation form space stiffness after the unit, should be timely the column bottom and top surface gap filling fine stone concrete finally fixed, make hinged column bottom comprised a solid, strong overall stability.

7.Component transport, stacking and components hoisting colligation point position of supporting points should be correct, in case of bending deformation of the components. Shall be carried out according to the scheme to determine the order of the installation, lifting should prevent collisions, installation is not, nor outside force in place, lest produce more than the limit stress component deformation.