If bidder applies one UPS (Dual redundant type) system for DCS, ESD, FGS and Telecom in CCB, Satellite rack room and Substation as company recommended, what is the UPS battery autonomy time among 1 hour and 4 hours?
how to calculate it?
ACI, AISC, ASCE and ASTM will apply to Civil and Structral. So pls help which of one is optimal and economical ASTM A36 or S275 J2 or S355ML/NL? Thank u
Bidders propeses ASTM A36 material istead of S275 J2 or S355ML/NL for structural steel (Piperack, Equipment Structure, etc.) on the basis of international standards for most optimal and economical design. Is it really optimal? pls explain why