stainless steel process

Specifications of steel bolts in the space truss system 

cheap steel bolt specifications. Specifications of steel bolts and steel space truss accessories are one of the things you need to know if you want to learn about space truss . The following article will provide accurate information on the basic technical requirements for these types of space truss accessories . Take the time to find out cheap steel bolt specifications.

Ⅰ. Specifications of steel bolts and steel space truss accessories

Raw materials and finished products should be provided with quality certification documents, ex-factory inspection marks and reports, etc.

Below are the detailed requirements for each type of raw material and finished product steel bolt specifications:

(1) Steel and structural steel bolt specifications and cheap steel bolt specifications.

1) The variety, specification and performance of steel and cast steel bolt specifications should meet the applicable national product standards and design requirements. The quality of imported steel products must meet the requirements of design standards and regulations, and must have a certificate of goods inspection with cheap steel bolt specifications.

2) It is necessary to conduct re-inspection of steel material in one of the following cases cheap steel bolt specifications:

a) Steel imported from abroad;

b) Mixed steel batch;

c) Thick plates having a plate thickness equal to or greater than 40mm and designed with Z-direction performance requirements;

d) The safety level of the building structure is level 1, which is the type of steel used as the main stress member in the large span steel structure;

e.Steel design requires re-inspection;

f. Steel has doubts about the quality.

Retest results must meet current national product standards and design requirements

(2) Steel space truss fittings welding materials

1) Welding consumable varieties, specifications and features must meet applicable national product standards and design requirements.

2) Welding materials used in critical steel structures should be sampled for retest and the results of the retest should meet applicable national product standards and design requirements.

(3) Pin standard parts for connection cheap steel bolt specifications.

1) High strength large hexagonal head space truss bolt connection pair for steel structure connection, twisted shear type high strength bolt connection pair, high strength bolt for mesh shape space truss frame steel, ordinary bolts, rivets, self-tapping screws, rivet pullers, firing screws, anchor bolts (Mechanical type and chemical reagent grade), anchor bolts and other standard fasteners, belt screws, washers and other standard steel space truss accessories, their varieties, specifications, performance, etc. must meet the applicable national product standards and design requirements. High strength large hex head bolt connection pair and torsion-cut high strength bolt connection pair must be shipped with the torque factor and axial torque (pre-tension) test report. ) corresponding cheap steel bolt specifications.

2) The cheap steel bolt specifications and steel space truss accessory moment factor of the pair of high-strength large hexagon bolts should be re-checked in accordance with the current national standard "Regulation for acceptance and acceptance of steel structure construction quality" GB50205 and test results must meet the requirements. Bolts for re-inspection are randomly selected from lots of bolts to be installed on-site, and 8 sets of connector pairs will be selected according to specifications for each batch for re-inspection.

3) The cheap steel bolt specifications and connection pair of high-strength bolts with torsion shear-type must be re-tested according to the current national standard "Construction quality acceptance code of steel structure" GB50205, and the test results must meet the following requirements: request. Bolts for re-inspection are randomly selected from lots of bolts to be installed on-site, and 8 sets of connector pairs will be selected according to specifications for each batch for re-inspection.

4) For steel space truss fittings structure of bolted ball joints, the high strength bolts of the connection are subjected to tensile load or surface hardness test and the value should be in accordance with current national standards. "High-strength bolts for bolted steel space trusses with spherical joints" GB / T16939 or " Tightening Mechanical properties of bolts, screws and firmware studs " GB3098.1. The surface hardness of 8.8-grade high-strength bolts should be HRC21~29; the surface hardness of 10.9-grade high strength bolts should be HRC32~36 and there should be no cracks or damage. Inspection Quantity: 600 bolts of the same specification packed in a batch, if less than 600 bolts still count as a batch, 3 bolts from each lot are selected for random inspection cheap steel bolt specifications and .

5) For bolt and steel space truss fittings designed with minimum load test requirement for bolts, their tensile strength shall meet the design requirement. When no design requirements are required, they shall meet the applicable national standard "Mechanical properties of bolts, screws, and dowels" GB3098 .1 or other applicable national product standard requirements. Bolts for re-inspection are randomly selected from lots of bolts to be installed on-site, and 8 sets of connector pairs will be selected according to specifications for each batch for re-inspection.

II. Choosing a partner to ensure the specifications of steel bolts and steel space truss accessories

To ensure good technical requirements, you should choose a reputable and quality company. However, currently on the market, there are still many units that do not meet the quality requirements, which can lead to some undesirable consequences. As one of the leading and experienced units in the industry, Tinta believes that it is a reliable companion with customers in the field of space truss design and space truss construction . We hope to receive more feedback from you.

Specifications of steel bolts and steel space truss accessories. Specifications of steel bolts and steel space truss accessories. To ensure good technical requirements, you should choose a reputable, quality space construction company selling cheap steel bolt specifications.

See the previous section on space truss quotes

Learn the details of the next section on space truss structures

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