supply of the description shall be treated as :-the description shall be treated as :-,the description shall be treated as :- manufacture & supply of 10125 mm curved switches with zu-1-60 / 60 e1a1 thick web grade 880 class a tongue rails and 60e1, r-260 grade, class a/b prime quality stock rails with elastic fasteners and spring operated setting device (rdso drg. no. t-6216 read along with latest alterations) complete (with check rail) with all fittings for 1 in 12 turnout bg 60 kg for f an shaped layout on psc sleepers for switch portion as per sub assembly rdso drg. no. t-6155 alt.-12 (r ead along with latest alterations) in accordance with rdsos standard drawing no. t-6154 (read along wi th latest alterations) excluding standard fish plates, fish bolts and nuts, elastic rail clips & insulating line rs. specification: i) irs - t - 10 -2025-for fabricated switches, ii) irs - t - 62 - 2025 - for end forging of t hick web asymmetrical rails. note: - i) zu - 1- 60 / 60 e1a1 thick web grade 880 class a rails for tongue r ail will be arranged by vendor at his own cost. rails for stock rails & check rails shall also be arranged b y supplier at their own cost in terms of railway board letter no. 2022/track-i(p)/fabricators dated 24.01. 2022 & dated 31.07.2023. ii) latest alterations will be applicable. [ warranty period: 30 months after t he date of delivery ] ]