pile Rebar extension
pile Rebar extension
(OP)
Due to the miscalculation of cutoff level, now I’m facing the 60 cm length shortage of pile rebars in to pile cap. How can I extend the rebars? By welding or splicing? What is minimum welding length required for 20mm dia torsteel in this condition?
Thanks
Regards






RE: pile Rebar extension
I would probably use some kind of a mechanical splice. Without knowing more details about he geometry, maybe cut the existing bars 1' or so above the top of the pile. Then use a mechanical splice and a new piece of rebar to get the correct length.
Hope this helps.
RE: pile Rebar extension
RE: pile Rebar extension
RE: pile Rebar extension
Also - You might want to look into using Dayton's BarLock mech. splice system, because it does not require pre-thread rebars.
Hope this helps
RE: pile Rebar extension
RE: pile Rebar extension
If I understand the problem properly, I would expect a mechanical bar splice to be the cost effective method of obtaining the required bar length. A lap splice will require an extra three feet of bar or something like that.
You may need to check if ties/spirals would be required if you want to use a lap splice in this situation.
Dinosaur
RE: pile Rebar extension
RE: pile Rebar extension
RE: pile Rebar extension
Well what does D1.4 say? My edition (98) allows welding of A615 bars with CE over 0.75 (Sec 1.3.1 item 7 and Table 5.2). For billet steel bars where the CE is unknown, D1.4 Sec 1.3.4.3 stipulates min preheat requirements based on bars sizes; 300 deg F for No.6 and smaller and 500 deg F for No.7 and larger.
I guess many agencies are not as liberal as AWS and only allow welding of low alloy bars unless special approval is granted for welding other rebar (i.e approval of WPS by dept). Even in the case of welding low alloy bars in lap and butt splices, some agencies still require departmental approval.
RE: pile Rebar extension