GENERAL CONSIDERATIONS FOR LAYING LWR/CWR
As a rule, complete track renewals (primary) shall provide for LWR/CWR wherever permissible by the provisions of this Manual. Also existing rails on permitted locations may be converted in to LWR/CWR, provided they meet the requirements laid down in the Manuals for Welding of Rail Joints by Alumino Thermic (SKV process)/Gas Pressure/Flash putt Process, as the case may be.
New constructions/doublings/gauge conversions/retired alignment/permanent diversion shall be opened with LWR/CWR, wherever permissible by the provisions of this Manual.
In goods running lines, goods yards, reception yards and classification yards, rail
joints may be welded to form LWR if the condition of all the components of track is generally sound and without any deficiency, subject to such relaxation as may be approved by Chief Engineer, in each specific case.
ALIGNMENT (As per CS.No 11)
LWR/CWR shall not be laid on' curves sharper than 440 metre radius both for BG and MG. However in temperature zone 1 LWR/CWR may be laid on curves upto 360m radius (5º curve) on B.G. with following additional precautions.