BT4- QUANTITY SURVEYING AND COST ESTIMATES

Quantity Survey

Preliminary estimation technique to establish

the quantity of a particular small part of work

Cost estimation

approximation of a cost of a portion or a

whole project

Labor and materials

Construction equipment

Construction supervision

General office overhead

Basic costs may be classified according to

Bill of Materials

A permit requirement which lists raw materials

and components to construct a project

Design Estimates

These estimates runs

parallel with the design and planning

Bid Estimates

These estimates are submitted for negotiation or competitive bidding which consists of construction costs plus a markup to cover general overhead and profits.

Subcontractor quotations

Quantity takeoffs

Construction procedures

Bid estimate is derived from a combination of the following:

Control Estimates

These estimates are in

used monitoring the project during

construction:

Excavated earth volume

in excavation earth volume is equal to

125 % loose volume (earthfill)

backfilling is equal to

Screening estimates

uses structures

of similar size to compare cost

Preliminary or conceptual estimates

coarse and rough estimates (an

assumption based on area, volume or

bulk)

Detailed estimates

fine detail of

quantities as plans and specifications

is broken down into components