METHOD STATEMENT FOR SBT PARALLEL THREADED COUPLERS
SBT Coupler is a parallel threaded system for reinforcing bars dia 16mm to 40mm dia. They produce full strength joint in the rebar connection
The ends of the reinforcing bar to be jointed are cut square and then enlarged by cold forging process to increase their core diameter to ensure that the joint is stronger than bar
The couplers are usually supplied attached to the reinforcing bars.
METHOD STATEMENT FOR SBT PRESSING COUPLERS
1. Remove the unnecessary attachments on the ends of the reinforcing Bars before extrusion such as rust, dirt and mortar .
2. The ends of the reinforcing bar should be straight
3. Mark the reinforcing bar with half of the couplers length
4. Insert the reinforcing bar up to the mark and press using special Hydraulic pressing machine with suitable moulds
5 .Then insert the second rebar into the other half of the coupler and press
REBAR SPLICING PROCESS WITH SBT COUPLERS
The end of the reinforcing bars to be jointed is sawn cut
The sawn cut ends of the reinforcing bar is then enlarged by cold forging process to increase its core diameter
Standard metric thread is then cut onto the enlarged end.
Finally, splice the rebar by using SBT parallel threaded couplers
TYPE A (WHEN THE CONNECTING BAR IS ROTATABLE)
When the connecting bar can be rotated, then end of the bars are threaded for half the length of coupler
After threading, rotate the connecting rebar to the initially screwed coupler, to the starter rebar to fully engage the coupler
TYPE B (WHEN THE BOTH BARS ARE NOT ROTATABLE)
Even when both bars are not rotatable, then starter bar is threaded for the full coupler length to screw coupler onto the extended threads. (But the connecting bar is threaded for half length of the coupler only)
Then complete assembly by butting the bars end to end and screw coupler onto the connecting rebar