IS 2974 : Part 3 : 1992 Design And Construction Of Machine Foundations -Code Of Practice Part 3 Foundations For Rotary Type Machines (Medium And High Frequency)

1 Scope

1.1 This code is primarily meant for designing framed typefoundations for turbo-generators machinery. However, the provisionsof this code may be used suitably for other machine foundations ofsimilar types, for example, foundations of turbo-compressor, boilerfeed pumps, etc.

1.2 The following classification shall apply to machines basedon their operating speeds:

Medium frequency 25 Hz < fm < 50 Hz

High frequency ≥ 50 hz

2 References

List of Referred Indian Standards

IS 432 : Part 1 :1982 Specification for mild steel andmedium tensilesteel bars and hard-drawn steel wire forconcrete reinforcement: Part 1 Mildsteel and medium tensile steel bars

IS 432 : Part 2 :1982 Specification for mild steel andmedium tensilesteel bars and hard-drawn steel wire forconcrete reinforcement:Part 2 Hard-drawn steel wire

IS 456 :1978Code of practice for plain and reinforcedconcrete

IS 1786 :1985 Specification for high strength deformedsteelbars and wires for concrete reinforcement

IS 1893 :1984Criteria for earthquake resistant design ofstructures

IS 2974 : Part 1 :1982 Code of practice for design andconstruction ofmachine foundations:Part 1 Foundations for reciprocating type machine

IS 2974 : Part 2 :1980 Code of practice for design andconstruction ofmachine foundations:Part 2 Foundations for impact type machine(hammer foundations)