For strength
For finishing
For prevent rail twisting
Supporting joint
Covering with copper sheets
Covering with steel sheets
Covering with mild steel sheets
Covering with carbon steel sheets
Full housing joint
Through housing joint
Dovetail housing joint
Stopped housing joint
1/3rd thickness of stock
2/3 rd thickness of stock
1/4 th thickness of stock
Full thickness of stock
Strong joint
Easy make
Easy transport
Large size