Tension control bolts direct tension indicator washers turn of nut tightening calibrated wrench tightening all of these methods start with the snug tightened condi tion and so it is easy to see why these extra steps add cost.
Tension control bolts vs slip critical.
The turn of nut method is widely used to obtain the minimum preload tension force specified for bolts in slip critical connections.
Tension control bolts and the innovative shear wrench system are the lowest cost method of properly i.
Where are pretensioned or slip critical requirements located.
The installation cost for bolted connections that are required to be slip critical are considerably higher than for snug tight connections and higher than pretensioned joints due to the treatment of the connected material s faying surfaces.
This first step is achieved with a few impacts of a pneumatic impact wrench or the full effort of a person using a spud wrench to bring the connected.
Slip critical joint from structural engineering is a type of bolted structural steel connection which relies on friction between the two connected elements rather than bolt shear or bolt bearing to join two structural elements.
Tension control bolts and direct tension indicators are discussed in section 8 2.
Downloads to incorporate our range of fasteners and shear wrenches into designs cad drawings technical and dimensional details along with quality certificates and installation documents are available to download.
This method consists in first snug tightening the bolts.
When the joint could be snug tightened and not slip critical.
The slip coefficient of a bolted connection is only a consideration for slip critical connections.
Dti are equivalent to load indicating washers and system hrc is effectively the same as tension control bolts tcbs.
Tension control bolt tcb installation training video.
However they may be used where oversized or slotted holes are used to increase tolerances during assembly.
5 joints with astm a490 or f2280 bolts that are subject to tension or combined shear and tension with or without fatigue.
Tension control bolts ltd offer a full range of shear wrench sales hire and repair services.
Shear and tension loads can be transferred between two structural elements by either a bearing type connection or a slip critical connection.
