How are bolt holes used in tension members?
Tension Member Design In tension members, there may be bolt holes that reduce the size of the cross section. Effective Net Area: The smallest effective are must be determined by subtracting the bolt hole areas. With staggered holes, the shortest length must be evaluated.
When do you need to know tension capacity of bolts?
The Advisory Desk is often asked for guidance on the calculation of tension capacity of bolts in tapped holes or when the end of the bolt is not protruding beyond the nut. Design rules in BS 5950 and Eurocode 3 do not cover these situations.
What do you use a drilled bolt for?
Drilled Bolts. These pre-drilled bolts (sometimes called safety bolts) are meant to be used with a safety wire to prevent loosening through vibration or other forces.
What are the effects of tightening holes in bolts?
Chesson and Munse studied the effects of tightening bolts in holes with up to 1/8 in. clearance using the turn-of-nutmethod with and without washers under the turned element.
Drilled Bolts. These pre-drilled bolts (sometimes called safety bolts) are meant to be used with a safety wire to prevent loosening through vibration or other forces.
Do you have to drill holes for fasteners?
This method, also called Wire Locking, is a highly visible and easily inspectable indication that the fasteners are properly secured. We machine these in-house and keep several sizes in-stock in both Hex Head and Socket Head. We can also custom drill safety holes to your specifications in a variety of materials and finishes.
Where does the Aqua Jack tensioner come from?
It has been primarily developed for use in the underwater environment where speed, ease of operation and reliability are paramount. In use, an Aqua-Jack tensioner is attached to every stud bolt in the joint assembly allowing simultaneous and uniform bolt tightening.
How is the load retained in a bolt?
The bolt load is retained in each bolt by inserting a tommy bar through the Aqua-Jack bridge window, into the pre- drilled hole in each flat of the hexagonal nut and turning in a clockwise direction until the nut seats against the flange surface. The hydraulic pressure is released and the load is retained in each bolt.