Page 21 - Industrial Process Plant Construction Estimating and Man Hour Analysis

xxxvi Introduction

TABLE 6 MH ə 5estimate for increased over fire duct work quantities

Estimate—duct
work Historical Estimate
Description MH Qty Unit Qty Unit BM
Over fire air duct 2100
Transition duct section 32.00 25.0 Ton 25.0 Ton 800
Bolted connection- 0.26 240.0 EA 240.0 EA 62
duct transition to ID
fan
Duct sections 32.00 9.0 Ton 8.0 Ton 256
Duct elbow 32.00 9.0 Ton 8.0 Ton 256
Field joint-weld flange 0.35 9.0 LF 8.0 LF 3
Bolted connection- 0.26 14.0 EA 12.0 EA 3
duct sections
Expansion joint 40.00 12.0 Ton 12.0 Ton 480
Duct support 40.00 7.0 Ton 6.0 Ton 240

TABLE 7 MH β 5estimate for decreased over fire duct work quantities
Estimate—duct
work Historical Estimate
Description MH Qty Unit Qty Unit BM
Over fire air duct 1712
Transition duct section 32.00 25.0 Ton 18.0 Ton 576
Bolted connection- 0.26 190.0 EA 190.0 EA 49
duct transition to ID
fan
Duct sections 32.00 7.0 Ton 7.0 Ton 224
Duct elbow 32.00 8.0 Ton 8.0 Ton 256
Field joint-weld flange 0.35 9.0 LF 9.0 LF 3
Bolted connection- 0.26 13.0 EA 13.0 EA 3
duct sections
Expansion joint 40.00 10.0 Ton 10.0 Ton 400
Duct support 40.00 5.0 Ton 5.0 Ton 200