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Galvanized bolts have a more resilient lubricant on them as compared to the water soluble lube on the plain bolts, but you still should save them properly too. If something happens to your tension control bolts out in the field, you can not simply re-lubricate them yourself. They should be returned to the maker for them to make the corrective steps and retest them.

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This is inadvisable because the bolts can lose their lubrication in as low as 3 days. Another thing to avoid is covering the bolts with a tarp in the outdoors components. Condensation can form causing the lubrication to completely remove. On the other hand, hot and dry weather condition makes the lubrication vaporize.

Some would argue that another con about stress control bolts is that they more expensive than both heavy hex bolts and DTIs (direct tension indicators). On top of the costlier bolt assembly, the shear wrench utilized for their installation performs at least $1700.  Also Found Here , Simply to conclude a few of the above points on the pros and cons of stress control bolts, here is a summary.

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You must pay attention and shop them effectively. And last but not least, it is feasible over whether they are more pricey or more affordable than their heavy hex bolt and DTI counterparts.

are now the most popular choice in high-strength structural bolting and formally recognized by the AISC (American Institute of Steel Construction) and the RCSC (Research Study Council on Structural Links) as an authorized installation technique. A Stress Control Bolts consists of 1 bolt, 1 nut and 1 washer, pre-assembled and there for they are shown, 1 lot number, on the accreditation paperwork.

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They are installed with a specialized electrical shear wrench that has an external socket that turns the nut counterclockwise, while getting the spline with the inner socket turning it clockwise. When the appropriate stress level has actually been accomplished the spline snaps off offering you a visual sign of proper setup.