Engineering Specification & Estimation Lecture Two 2022 PDF

Engineering Specification & Estimation Lecture Two M.Sc Sattar Isawi Architectural Engineering...

Engineering Specification & Estimation Lecture Two M.Sc Sattar Isawi Architectural Engineering University of Basrah 2022 M.Sc Sattar Isawi (Architectural EngineeringUniversity Engineering of Basrah) Specification & Estimation 2022 1 / 10  Introduction Technical Terms Quantity Surveying The calculation of quantities of materials required to complete the project work. These quantities are estimated and/or calculated from: Project drawings Design stage −→ Quantity estimation (computation) Built items Construction stage −→ Quantity calculation after work done Quantity Surveyor The engineer (surveyor) is responsible for the calculations of materials quantities and their cost computation. The quantity engineer plays a key role in the project implementation, in both the design and construction stages. Design stage −→ Works for the project owner Pre-construction stage −→ Works for the project contractor M.Sc Sattar Isawi (Architectural EngineeringUniversity Engineering of Basrah) Specification & Estimation 2022 2 / 10  Introduction Necessity of Estimates To know about the approximate cost of the project construction. To know about the various items of works involved in the project and arrange the available materials of the construction. To arrange the labours of the construction works. Take the approval for the government projects. To having the loan from the bank. M.Sc Sattar Isawi (Architectural EngineeringUniversity Engineering of Basrah) Specification & Estimation 2022 3 / 10  Introduction Types of Estimates Rough Estimate Project comparison Square meter method Cubic meter method Detailed Estimate M.Sc Sattar Isawi (Architectural EngineeringUniversity Engineering of Basrah) Specification & Estimation 2022 4 / 10  Introduction Procedure of Estimating Estimating involves the following operations: Preparing detailed Estimate Drawings i.e. plans, elevations, sections etc. Specifications (work procedures & quality of materials and workmanship ) Rates (unit rates of each item of work) Calculating material quantities and rate of each unit of work Preparing abstract of estimate (Tender) M.Sc Sattar Isawi (Architectural EngineeringUniversity Engineering of Basrah) Specification & Estimation 2022 5 / 10  Introduction General Project Requirements The general requirements are important to the estimating process because they provide the information needed to assign a monetary value to the project overhead items. General Requirements include items such as: Consultant Engineering Fees Cost of design Cost of supervision Temporary Facilities and Controls Project Meetings Submittals Testing Requirements Project Record Documents Quality Control Commissioning M.Sc Sattar Isawi (Architectural EngineeringUniversity Engineering of Basrah) Specification & Estimation 2022 6 / 10  Introduction General Project Requirements The general requirements can be classified for estimating purposes into two main categories: fixed costs and variable costs. Fixed Costs Fixed costs are associated with onetime project requirements, for example Building permit fees Project mobilization/demobilization costs Prepaid insurance premiums Variable Costs Variable costs are schedule driven and are determined based on the length of time the items or services are needed on the project, such as Trailer rental Telephone and electrical power usage Supervision costs M.Sc Sattar Isawi (Architectural EngineeringUniversity Engineering of Basrah) Specification & Estimation 2022 7 / 10  Introduction Complete Estimate The complete Estimate must include all direct and indirect costs for a project implementation. Detailed Estimate (direct costs) General Project Requirements (indirect costs) M.Sc Sattar Isawi (Architectural EngineeringUniversity Engineering of Basrah) Specification & Estimation 2022 8 / 10