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Chapter 7

Chapter 7. Measuring Carpentry and Miscellaneous Items. Objectives. Upon completion of this chapter, you will be able to: Describe a system that will allow an estimator to accurately measure detailed carpentry work on a large project Calculate quantities of lumber and sheet materials.

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Chapter 7

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  1. Chapter 7 Measuring Carpentry and Miscellaneous Items

  2. Objectives • Upon completion of this chapter, you will be able to: • Describe a system that will allow an estimator to accurately measure detailed carpentry work on a large project • Calculate quantities of lumber and sheet materials

  3. Objectives (cont’d.) • Describe how to measure carpentry work in a takeoff • Describe how carpentry work is classified in a takeoff • Measure rough carpentry, finish carpentry, and miscellaneous items from drawings and specifications • Complete a manual takeoff of carpentry work and miscellaneous items

  4. Measuring Rough Carpentry • Detailed carpentry work quantity takeoff • Requires comprehensive carpentry knowledge when estimating • Standard practices and code requirements • Framing methods and design requirements • Estimating commercial and institutional buildings • Different skills required

  5. Board Measure • Unit of measurement of lumber Figure 7.1 Sample Board Measure Calculations (Delmar/Cengage Learning)

  6. Metric Units • Metric system: • Lumber will be in millimeters • Sheathing does not change • Described in mm rather than inches • Takeoff process • Items of lumber: measured in linear meters

  7. Measuring Notes—Rough Carpentry • Generally: • Lumber • Measured in board measure or linear meters • Measure lumber separately • Dimensions, dressing, grade, and species • Describe special treatment required • Kiln dried, pressure treated, etc.

  8. Measuring Notes—Rough Carpentry (cont’d.) • Wall boards • Measured in square feet or square meters • Do not deduct for openings • Less than 40 square feet • Classify wall boards • Measure separately • Framing work • Lumber is classified and measured separately

  9. Measuring Notes—Rough Carpentry (cont’d.) • Other considerations: • Trusses, truss joists, and truss rafters • Manufactured beams, joists, and rafters • Sheathing • Copings, cant strips, fascias • Soffits • Sidings

  10. Measuring Notes—Rough Carpentry (cont’d.) • Vapor barriers and air barriers • Underlay and subfloors • Blocking and furring • Rough hardware

  11. Measuring Finish Carpentry and Millwork • Finish carpentry on commercial project • Materials • Supplied by a millwork subcontractor • Installed by general contractor • Architectural woodwork • Supplied by millwork contractor as finish carpentry • Supplied and installed by custom subcontractor

  12. Measuring Finish Carpentry and Millwork (cont’d.) • Estimators should be familiar with: • Trade scope definitions of finish carpentry • Architectural woodwork in project location • Evaluate supplied items • Items outside scope of subtrades • All are priced for installation costs and supply

  13. Measuring Notes—Finish Carpentry • Generally: • Classify and measure items separately • Rough carpentry: grounds, rough bucks, etc. • Include allowance for rough hardware • Metalwork: measured under miscellaneous metals • Glazing: include in glazing section • Unless integral part of prefabricated cabinet work

  14. Measuring Notes—Finish Carpentry (cont’d.) • Other considerations: • Trim • Shelving • Stairs • Cabinets, counters, and cupboards • Paneling

  15. Doors and Frames • Usually obtained from subcontractors • Quote prices and deliver goods • General contractors • Estimate cost of handling and installing • Different sections of specifications • Deal with metal and wood doors, frames, assemblies, and special doors

  16. Windows • General contractors • Obtains prices from subtrades • No work for them to measure • Small jobs • May not be worthwhile hiring separate specialists • Components may be obtained directly from suppliers

  17. Miscellaneous Metals • Miscellaneous metals trade • Prices received from specialized subcontractors • Supply and installation • “Supply only” • General contractor • Ability to prepare a realistic estimate • Wide scope

  18. Specialties • Specialty trades • Wide-ranging trade section • Subcontractors will offer different price quotes • Example: bathroom accessories

  19. Finish Hardware • Supply cost • Cash allowance is often specified on larger projects • Otherwise obtained from a subcontractor • Estimating costs • Calls for quantity takeoff of all finish hardware requirements

  20. Measuring Exterior and Interior Finishes • General contractor’s estimator • Does not usually measure finishing work for an estimate • Almost invariably subcontracted these days • Performed on some occasions

  21. Examples • Carpentry and miscellaneous work takeoff—house example • Takeoff notes shown as Figure 7.2a • Rough Carpentry—Floor System • Rough Carpentry—Wall System • Rough Carpentry—Roof System • Finish Carpentry

  22. Examples (cont’d.) • Exterior and interior finishes takeoff—house example • Takeoff shown as Figures 7.3 and 7.4 • Exterior finishes • Interior finishes

  23. Summary • Thorough knowledge of carpentry construction • Required to prepare a detailed estimate • Estimator must apply a systematic approach • Carpentry requirements of commercial and institutional projects • Usually well detailed

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