nam a22 7a 4500 1234 1234 OSt 20180220110340.0 180103b xxu||||| |||| 00| 0 eng d 978-81-925797-3-3 Indian Buildings Congress, New Delhi 404 28/12/2017 2017-18 BSDU English BSDU 696 IBC Indian Buildings Congress Guidelines for Electrical and Mechanical Works in Buildings : Escalators, Life safety and Security, Fire Safety Systems & HVAC New Delhi Indian Buildings Congress 2013 268 Civil Buildings Standards IBC ddc BK 1 0 0 ddc 0 0 BSDU BSDU REF 2018-01-03 500.00 1 696 IBC 014395 2020-09-18 00:00:00 2018-01-10 2018-01-03 BK