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Technical Specifications
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Describe the quality of materials and workmanship, along with general requirements for the execution of the work, standards, and other items that are more appropriately described in written form.
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Contents of a project manual:
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1. Bidding Requirements2. Supplements to Bid Forms3. Contract Forms4. General Supplementary Conditions5. Technical Specifications
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Prescriptive specifications (closed):
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Tell exactly what products or material the contractor must use by using brand names.
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Performance Specifications (open):
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Tell what results the final construction assembly must achieve, but they give the contractor some choice in how they will be achieved.
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Two types of prescriptive specifications:
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1. Proprietary2. Base-bid
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Three types of performance specifications:
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1. Descriptive2. Reference Standard3. Pure Performance
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Proprietary Specifications
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The most restrictive spec. in that they call out a specific manufacturer's product. ID has complete control.
*Do not allow for competitive bidding |
Base Bid Specification (Equal Specification)
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Calls out a proprietary material or product but allows the substitution of other products that the contractor thinks are equal to the one stated.
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Descriptive Specification
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A type of performance spec. that gives detailed written requirements for the material or product and the workmanship required for its fabrication and installation. It does not mention trade names.
*difficult to write |
Reference Standard Specification
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A variation of the descriptive specification type that describes a material, product, or process based on requirements set by an accepted authority or test method.
*fairly easy to write |
Pure Performance Specification
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A statement setting criteria and results required of the item being specified. The results can be verified by measurement, tests, or other types of evaluation. The means of achieving the required results are not specified; this is left up to the contractor.
*rarely used for interior construction |
Master Specification
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Prewritten specifications that cover nearly all types of products, methods of installation, and other variables that relate to a specific product or construction activity.
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Guide Specification
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Similar to master specifications, but not as complete.
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Part 1
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General requirements for the sections, such as the scope of the section, submittals required, quality assurance requirements, warranties, project conditions, and specifications for the delivery, storage, and handling of materials.
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Part 2
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Details the specifications for the materials and products themselves, including accepatble manufacturer, what standards and test methods the materials must conform to, how items are to be fabricated.
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