How to apply for steel structure qualification certificate

First of all, you must understand the materials required for declaration, the requirements for assets, etc., and prepare them completely. Then, after recruiting the personnel and making the materials, you can submit an application to the construction department. After passing the review, you can receive the steel structure qualification certificate.

What are the precautions for steel structure construction?

1. In steel structure construction, first of all, before installation, attention should be paid to inspecting the product certificate of the construction unit, as well as its design documents and Pre-assembly records require rigorous inspection.

2. At the same time, the dimensions of the components must be checked and recorded, so they must be understood before construction.

3. Steel structure construction is prone to deformation. If the defective part exceeds the allowable deviation value, it must be dealt with in time.

4. When installing the steel structure, it needs to be corrected and measured, and the construction process must be prepared.

5. After the steel structure is hoisted in place, the positioning axis of the components, as well as the elevation and other designs must be marked accordingly.

6. At the same time, attention should be paid to the welding of the steel structure. It must be sealed and firm so as not to affect its normal use.

7. Steel structure buildings need to be reviewed by relevant departments and obtained a steel structure qualification certificate before construction. Full preparations must be made before applying, otherwise a second application is likely to be required. , this will affect the progress of the construction, so the details in this area still need to be paid attention to.

Causes of water leakage in steel structure roofs

1. The main reasons for water leakage at the ridge are: the crest at the ridge is too high, and the ridge cover cannot guarantee waterproofing; do not put glue or silica gel on the longitudinal overlap , forming a gap and causing water leakage; the longitudinal overlap of the ridge cover is connected with rivets, and the thermal expansion and contraction strength is not enough and the rivets are broken, causing water leakage; no plugs are laid between the ridge cover and the roof panel, or the plugs are placed irregularly and cause Falling off causing water leakage.

2. The main reasons for water leakage in the roof gas floor are: no foam plugs are placed under the closing edge at the junction of the gas building and the roof, and no cement or silica gel is laid on the longitudinal overlap of the closing edge; the outer panels of the roof are There is no slab on the junction of the gas building; the openings of the structural pillars of the gas building are not waterproofed; there are hidden dangers of water leakage in the production and installation of the gas building itself.

3. The laying of cement and waterproof screws during the installation of lighting panels are the main hidden dangers of roof leakage; the type of lighting panels does not match the type of roof panels, and the crests on both sides of the lighting panels are higher than those of the roof panels. Finally, the sealing was too tight, resulting in a difference in air pressure between the inside and outside of the lighting panel. Capillary water entered the interior of the roof from the gaps on both sides of the lighting panel and leaked; the length of the longitudinal overlap of the lighting panel was not enough, and the glue lost its viscosity due to aging; the longitudinal glue fell off; between the lighting panel and the color steel plate It is a rigid overlap and the gap in the middle is not sealed.