ACH 216 Lecture 10 (Materials Mgmt & Quality Assurance)


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ACH 216 Lecture 10 (Materials Mgmt & Quality Assurance)

  1. 1. Project Management & Control Project Funding (LECTURE 7) Scheduling (LECTURE 8) Issues During the Construction Project (LECTURE 9) Materials Management and Quality Control (LECTURE 10)
  2. 2. Materials Management & Quality Assurance Materials Management Process Categories of Material Ordering Fabrication and Delivery Installation Value Engineering
  3. 3. Materials Management Process <ul><li>In a traditional contract, the process of procuring and executing materials and labor looks like this: </li></ul>Order Approval Process Fabrication and delivery process Installation
  4. 4. Categories of Material <ul><li>Building construction materials are grouped into 3 categories: </li></ul><ul><ul><li>Bulk Materials </li></ul></ul><ul><ul><li>Manufacturer’s Standard Items </li></ul></ul><ul><ul><li>Customized Fabricated Items </li></ul></ul>Grouping these materials into categories determines which materials need major contractor control, approval and accommodations
  5. 5. Categories of Materials <ul><li>Bulk Materials </li></ul><ul><ul><li>Require little to no fabrication </li></ul></ul><ul><ul><li>Can be delivered from vendor location to job site </li></ul></ul><ul><ul><li>Usually require 1-5 days lead time for delivery </li></ul></ul><ul><ul><li>Submittals require only product and performance data </li></ul></ul><ul><li>Typical Bulk Materials </li></ul><ul><ul><li>Paving materials </li></ul></ul><ul><ul><li>Fill materials (crushed stone, soil) </li></ul></ul><ul><ul><li>Dampproofing membrane </li></ul></ul><ul><ul><li>Lumber and related supplies </li></ul></ul><ul><ul><li>Form materials </li></ul></ul><ul><ul><li>Ready-mix concrete </li></ul></ul><ul><ul><li>Wire mesh </li></ul></ul><ul><ul><li>Stock reinforcing steel & accessories </li></ul></ul><ul><ul><li>Masonry </li></ul></ul><ul><ul><li>Stock misc. metals </li></ul></ul><ul><ul><li>Soil and waste piping </li></ul></ul><ul><ul><li>Water piping </li></ul></ul><ul><ul><li>Electrical conduit </li></ul></ul><ul><ul><li>Electrical rough-in materials </li></ul></ul><ul><ul><li>Caulking & sealants </li></ul></ul>
  6. 6. Categories of Materials <ul><li>Manu. Standard Items </li></ul><ul><ul><li>Stocked in limited quantities </li></ul></ul><ul><ul><li>Used in the fabrication of custom items </li></ul></ul><ul><ul><li>Submittals requirements </li></ul></ul><ul><ul><ul><li>Detailed shop drawings </li></ul></ul></ul><ul><ul><ul><li>Product/performance data </li></ul></ul></ul><ul><ul><ul><li>Samples </li></ul></ul></ul><ul><ul><li>Ordering requires approved submittal </li></ul></ul><ul><ul><li>Lead time vary, but usually 2-12 weeks </li></ul></ul><ul><li>Typical Standard Item Materials </li></ul><ul><ul><li>Fencing Materials </li></ul></ul><ul><ul><li>Brick paving </li></ul></ul><ul><ul><li>Formwork systems </li></ul></ul><ul><ul><li>Brick & ceramic veneers </li></ul></ul><ul><ul><li>Structural steel members </li></ul></ul><ul><ul><li>Metal decking </li></ul></ul><ul><ul><li>Waterproofing products </li></ul></ul><ul><ul><li>Insulation products </li></ul></ul><ul><ul><li>Doors & windows </li></ul></ul><ul><ul><li>Standard casework and millwork </li></ul></ul><ul><ul><li>Roofing materials </li></ul></ul><ul><ul><li>Flooring materials (tile, carpet, HW) </li></ul></ul><ul><ul><li>Paints and wallcoverings </li></ul></ul><ul><ul><li>Equipment (food service, bank, etc.) </li></ul></ul><ul><ul><li>Elevators, escalators, etc. </li></ul></ul><ul><ul><li>Most mechanical and plumbing materials </li></ul></ul>
  7. 7. Categories of Materials <ul><li>Custom Fabricated Items </li></ul><ul><ul><li>Must conform to project conditions </li></ul></ul><ul><ul><ul><li>Usually require a portion of the work to be completed for field verification </li></ul></ul></ul><ul><ul><li>Uses manu. Standard items to fabricate </li></ul></ul><ul><ul><li>Requires submittal approval and field verification before fabrication and installation </li></ul></ul><ul><ul><li>Lead times can vary </li></ul></ul><ul><ul><ul><li>Typically 2-12 weeks </li></ul></ul></ul><ul><ul><ul><li>Can be up to 24 weeks </li></ul></ul></ul><ul><li>Typical Custom Fabricated Items </li></ul><ul><ul><li>Millwork </li></ul></ul><ul><ul><li>Special casework and cabinetry </li></ul></ul><ul><ul><li>Special conduit </li></ul></ul><ul><ul><li>Switchboards and panels </li></ul></ul><ul><ul><li>Transformers </li></ul></ul><ul><ul><li>Lighting fixtures </li></ul></ul><ul><ul><li>Motors and starts </li></ul></ul><ul><ul><li>Fire alarm equipment </li></ul></ul><ul><ul><li>Structural steel </li></ul></ul><ul><ul><li>Precast panels and decks </li></ul></ul><ul><ul><li>Stone veneers </li></ul></ul><ul><ul><li>Ornamental metals </li></ul></ul><ul><ul><li>Custom doors and windows </li></ul></ul><ul><ul><li>Storefront and glass/glazing </li></ul></ul><ul><ul><li>Window walls and curtain walls </li></ul></ul><ul><ul><li>Window treatments </li></ul></ul>
  8. 8. Ordering <ul><li>Each submittal will be sent from each subcontractor or supplier to general contactor. </li></ul><ul><li>Then submittal of materials must be sent to architect for approval. This can include the following: </li></ul><ul><ul><li>Detailed shop drawings </li></ul></ul><ul><ul><li>Product and performance data </li></ul></ul><ul><ul><li>Samples </li></ul></ul><ul><ul><li>Testing reports (from independent agencies) </li></ul></ul><ul><ul><li>Warranties </li></ul></ul>Refer to page 325 in your book
  9. 9. Ordering <ul><li>Architect will review submittal for drawing and materials specification compliance. </li></ul><ul><li>Then architect will note submittals with following: </li></ul><ul><ul><li>Approved (or No Exceptions Taken) </li></ul></ul><ul><ul><li>Approved as noted </li></ul></ul><ul><ul><li>Revise and Resubmit </li></ul></ul><ul><ul><li>Rejected </li></ul></ul><ul><li>Submittals will be returned to GC and action is taken accordingly </li></ul><ul><ul><li>Order and fabricated material </li></ul></ul><ul><ul><li>Revise shop drawing to comply with docs and resubmit </li></ul></ul>Refer to page 332
  10. 10. Fabrication and Delivery <ul><li>There are usually multiple copies of submittals; one each for architect, GC and subc/supplier </li></ul><ul><li>General Contractor releases subcontractor or supplier on order </li></ul><ul><ul><li>Uses a purchase order (to be covered further in ACH 218) </li></ul></ul><ul><li>Subcontractor/supplier needs to furnish GC with anticipated delivery date </li></ul><ul><ul><li>Absolutely required to meeting project schedule </li></ul></ul><ul><li>Materials are fabricated, packaged and shipped to site </li></ul><ul><ul><li>Shipping and payment terms will be discussed in ACH 218 </li></ul></ul>
  11. 11. Installation <ul><li>Fabricated materials arrive at job site (or subc’s shop). </li></ul><ul><li>Depending on scheduling materials can be: </li></ul><ul><ul><li>Installed immediately </li></ul></ul><ul><ul><li>Partially installed and partially stored </li></ul></ul><ul><ul><li>Completely stored for later installation </li></ul></ul>
  12. 12. Installation <ul><li>Storage of Materials </li></ul><ul><ul><li>Becomes a critical element in protection of the materials </li></ul></ul><ul><ul><ul><li>Weather hazards including water damage & freezing </li></ul></ul></ul><ul><ul><ul><li>Vandalism and theft </li></ul></ul></ul><ul><ul><li>Also a cost implication to the budget if materials arrive earlier than anticipated </li></ul></ul><ul><ul><li>Typically storage facilities </li></ul></ul><ul><ul><ul><li>Secure room in trailer (for smaller items) </li></ul></ul></ul><ul><ul><ul><li>Secure room in building </li></ul></ul></ul><ul><ul><ul><li>Trailer (should be weather-proof) </li></ul></ul></ul><ul><li>Material storage must be planned with dealing with multiple floors and areas on the project </li></ul><ul><ul><li>Failure to do so could result in mismanagement of resources </li></ul></ul>
  13. 13. Value Engineering <ul><li>Value engineering is a process that considers cost in context with other factors: </li></ul><ul><ul><li>Life-cycle cost </li></ul></ul><ul><ul><li>Quality </li></ul></ul><ul><ul><li>Durability </li></ul></ul><ul><ul><li>Maintenance </li></ul></ul><ul><li>The idea of “better bang for the buck” in considering materials and workmanship </li></ul>
  14. 14. Value Engineering <ul><li>Value engineering allows the contractor to make suggestions during the design process </li></ul><ul><ul><li>Works very well in design-build, as long as quality remains at the forefront </li></ul></ul><ul><li>Owner will provide criteria to architect and contractor in regards to levels of material quality and price </li></ul><ul><ul><li>Best cost </li></ul></ul><ul><ul><ul><li>Determined in the life-cycle cost analysis </li></ul></ul></ul><ul><ul><li>Best function </li></ul></ul><ul><ul><ul><li>How well will it work in the building </li></ul></ul></ul><ul><ul><li>Best aesthetic value </li></ul></ul><ul><ul><ul><li>Depends on importance in building </li></ul></ul></ul>
  15. 15. Value Engineering <ul><li>Process of VE can take many forms, but here is a good example: </li></ul><ul><ul><li>Identification of areas for review </li></ul></ul><ul><ul><ul><li>Typically broken down by trade (mech., elec., building system) </li></ul></ul></ul><ul><ul><ul><li>Opportunities to take advantage of new products and processes </li></ul></ul></ul><ul><ul><li>Brainstorming session </li></ul></ul><ul><ul><ul><li>Meeting of individuals to discuss findings and toss around ideas; opportunity to discuss researched materials </li></ul></ul></ul><ul><ul><li>Analysis of each recommendation </li></ul></ul><ul><ul><ul><li>Criteria is set by which VE idea will be evaluated and tested </li></ul></ul></ul><ul><ul><ul><li>Costs are discussed and compared in life-cycle cost analysis </li></ul></ul></ul><ul><ul><li>Report and documentation </li></ul></ul><ul><ul><ul><li>Findings are forwarded for further decision on whether to use or not use VE materials and methods </li></ul></ul></ul>
  16. 16. NEXT CLASS LECTURE 11 Safety