Weight factors for Mechanical Equipment installation Work

This post describes typical weight factors that can be utilized to establish the progress calculation sheet for equipment erection work. Followings are the sample weight factors for each work step for each equipment category.

Static Equipment-Column & Vessel, Shell & Tue Heat Exchangers Installation

Chipping & Padding --10%
Lifting & Rigging --60%
Alignment --10%
Inspection ---10%
Grouting ---10%

Package Equipment-Boiler Installation

Main Parts Installation (Main body, Economizer, Air Pre-heater, Stack)—55%
Stairway and ladder installation ----20%
Duct Installation (Including Damper) ----10%
Accessories (Fan, Silencer, Soot blower, Burner) Installation ----10%
Punch Items --- 5%

Package Equipment-Demineralization Plant

Chipping & Padding -----10%
Lifting & Rigging -----70%
Leveling & grouting ----10%
Alignment for rotating equipment-10%

Equipment access platforms/ladders
Assembly at site -----40%

Installation -----55%
Punch Item -----5%

Internal Tray Installation work for Reactor/Column/Drum/Vessel

Preparation----20%
Installation -----75%
Punch Item ----5%

Rotating Equipment-Air Fin Cooler/Air Cool Exchanger

Access platform installation -----20%
Tube Bundle Installation -----40%
Mechanical Part Installation -----30%
Final Alignment -----10%

Rotating Equipment-Pump/Compressor/Blower

Chipping & Padding -------5%
Lifting & Rigging ------40%
Leveling & Grouting ------15%
First Alignment -------30%
Final Alignment ------10%

See also Weight factors for Electrical Construction Work