Hainan Steel teach you: install steel fasteners Requirements

Steel production and installation unit according to this specification of the appendix are high strength bolt anti-slip coefficient of friction surface test and retest, the scene of the friction surface member should separate anti-slip surface coefficient of friction test was It should meet the design requirements.
Anti-slip coefficient is one of the main parameters of high strength, directly affecting the bearing capacity member. Therefore, regardless of bolts connecting the friction surface treatment by the manufacturer or by a field treatment, should be tested for anti-slip coefficient. At the installation site locally using the grinding wheel friction surface, grinding range not less than four times the bolt aperture, grinding direction should be perpendicular to the direction of the force member.
In addition to the design using the friction coefficient is less than equal to 0.3, and clearly may not be anti-slip coefficient test persons, the rest of the case in order to determine the processing method of the production of the friction surface, you must press the required quantities and by three sets of the same material, the same processing method It specimens for retest before installation. Hainan Steel