Steel structure company processing: steel structure construction requirements

Due to the relatively light weight and simple construction, steel structure is widely used in large factories, exhibition halls, high-rise residential buildings and other industries.

Steel structure company processing: steel structure installation requirements

(1) There should be construction technology or plan, accurate measurement and correction, high-strength bolt assembly, negative zero construction and welding methods need to carry out process test or appraisal before construction.

(2) The assembly deviation inspection shall be carried out after the module generating bending rigidity of indoor space is constructed and connected and fixed.

(3) During installation, the flat roof, wall platform and construction load must be manipulated, and the wind and snow bearing capacity must not exceed the bearing capacity of beam, truss structure, floor panel, roof and service platform.

(4) After the space unit is formed, secondary irrigation such as pea-stone concrete and high-strength grouting material shall be carried out in time for the gap between the bottom plate of the column and the top of the foundation (pad with steel pad, and the welding thickness shall not exceed 5 pieces).

(5) The beam of the lifting equipment or the beam directly bearing the power load shall be subject to the bending flange plate, the truss structure of the lifting equipment or the truss structure directly bearing the power load, and the suspension objects and fixtures on the bending chord shall not be welded by electric welding.

Steel structure company processing: foundation and support surface, installation and calibration provisions

(1) The building axis, premise center line, design elevation and anchor screw shall meet the requirements (design elevation ± 3mm, anchor screw exposed light steel structure 20mm, national standard 30mm).

(2) Line deformation and coating shedding caused by transportation, stacking and lifting of steel structure members shall be corrected and repaired.

(3) The marks of axis and design elevation measuring point of steel beam and other structures shall be perfect.

(4) When the steel tube truss (beam) is installed at the concrete column, the error of the rubber bearing core to the axis should not be greater than 10mm. When large and medium-sized concrete roof is used, the error of the spacing of the steel tube truss (or beam) should not be greater than 10mm.

(5) The surface of the prefabricated components shall be clean and tidy, and the key surface of the structure shall be free of scars, fine sand and other stains.

(6) Check whether the steel structure platform, steel stairs and guardrails meet the national standards.

(7) Pay attention to check the engineering drawings to avoid reverse installation of C- type 2 steel purlins.

Steel Structure Company Processing: Roof Installation Requirements

(1) Long-term wind frequency shall be paid attention to for steel plate paving, and the lapping of plate rib reinforcement shall be opposite to the long-term wind frequency.

(2) The thick steel plates are connected to each other, only the steel bars overlap one rib, and the big edge must be buckled beside the small one.

(3) At the room ridge, it is necessary to bend more than 80 degrees on the thick steel plate to produce the baffle, and bend 10 degrees under the drainage ditch to produce dripping lines.

(4) Leave a gap of 20~50mm up and down between the thick steel plates on the two slopes at the ridge to facilitate inserting special tools for bending. This gap is not easy to be too large and too small. The profiled steel plate extends 100~150mm up and down at the drainage ditch.

(5) The fixed self-tapping screw shall be vertical to the thick steel plate and steel purlin, and point to the core of the steel purlin. The nail shall be marked or set off before nailing to make the nail hit a straight line.