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Estimating & Specifications CVL305

Estimating & Specifications CVL305. Estimating Overview. Estimating is not only the costing of a project but it involves: understanding of the entire project operation from tendering to actual construction procedures involved in the completion customer satisfaction. Requirements. drawings

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Estimating & Specifications CVL305

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  1. Estimating & SpecificationsCVL305

  2. Estimating Overview • Estimating is not only the costing of a project but it involves: • understanding of the entire project • operation from tendering to actual construction • procedures involved in the completion • customer satisfaction

  3. Requirements • drawings • represent the graphical information • sizes • materials • assemblies • details

  4. Requirements • specifications • represent everything that is not on the drawings and MORE • general conditions for the project (nothing to do with the drawings) • specific material descriptions • procedures for material assemblies

  5. Type of Specifications • NMS –National Master Specifications • composed of 49 divisions • OPSS- Ontario Provincial Standard Specifications • composed of 8 volumes • Either one is always used in tendering if the owner wants to prevent problems during construction

  6. Municipal & Provincial Common: • OPS Volume 1 • General & Construction Specifications • OPS Volume 2 • Material Specifications • OPS Volume 3 • Drawings for Roads, Drainage, Sanitary Sewers, Watermains, & Structures • OPS Volume 4 • Drawings for Electrical Work

  7. Provincial-Oriented: • OPS Volume 5 • MTO General Conditions of Contract and General & Construction Specifications • OPS Volume 6 • Material Specifications • Municipal-Oriented: • OPS Volume 7 • OPS General Conditions of Contract and General & Construction Specifications • OPS Volume 8 • Material Specifications

  8. OPS GENERAL CONDITIONS OF CONTRACT • SECTION GC 1.0 – interpretation • SECTION GC 2.0 – contract documents • SECTION GC 3.0 – administration of the contract • SECTION GC 4.0 – owner’s responsibilities and rights • SECTION GC 5.0 – material • SECTION GC 6.0 – insurance, protection and damage • SECTION GC 7.0 – contractor’s responsibilities and control of the work • SECTION GC 8.0 – measurement and payment

  9. Tendering / bidding Classification of estimates • PRELIMINARY  METHODS • (engineer / architect / developer) • area  and  volume  methods • this  method  involves  computing the  number  of  cubic  meters  or square  meters  for  a  project  then multiplying  that  number by  a  cost

  10. Tendering / bidding Classification of estimates • DETAILED  METHOD  • (contractor / builder) • includes determination of the quantities & cost for everything required to complete a project, material, labour, insurance, bonds, overhead and profit

  11. Classification of bids • Competitive bid • involves each contractor submitting Lump-Sum Bids or Unit Price Bids in competition with other contractors to build the project • in  most  casesthelowestbidis awarded  the  contract • the bids must be delivered to the person or place by a specific time as stated in the specifications

  12. Classification of bids • Negotiated bid • involves the contractor working with the owner to arrive at a mutually  acceptableprice for the construction of the project • Cost Plus a Fee or Time & Material

  13. Addendums • fromthetimethecontractorreceivesthedrawings&specstothetimethebidsareduethisisknownasbiddingperiod • any changes made by the architect \ engineer to the drawings and specifications will be issued in the form of an addendum

  14. Assignment • Calculate quantities without using any mechanical measuring instruments or tapes / chains • pacing and height approximation can be used • see specifics in Blackboard

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