CE6506 CTEP Notes
Anna University Regulation 2013 CIVIL CE6506 CTEP Notes, CONSTRUCTION TECHNIQUES, EQUIPMENT AND PRACTICE Lecture Handwritten Notes for all 5 units are provided below. Download link for CIVIL 5th SEM CE6506 CONSTRUCTION TECHNIQUES, EQUIPMENT AND PRACTICE Lecture Handwritten Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.
UNIT –II CONSTRUCTION PRACTICES
Specification for construction Specifications describe the materials and workmanship required for a development. They do not include cost, quantity or drawn information, and so need to be read alongside other information such as quantities, schedules and drawings.Specifications vary considerably depending on the stage to which the design has been developed, ranging from performance specifications (open specifications) that require further design work to be carried out, to prescriptive specifications (closed specifications) where the design is already complete.
Having a prescriptive specification when a contract is tendered gives the client more certainty about the end product, whereas a performance specification gives suppliers more scope to innovate, and adopt cost effective methods of work, potentially offering better value for money.Typically, performance specifications are written on projects that are straight-forward and are well-known building types, whereas prescriptive specifications are written for more complex buildings, or buildings where the client has requirements that might not be familiar to suppliers and where certainty regarding the exact nature of the completed development is more important to the client.
An exception to this might be a repeat client such as a large retailer, where a specific, branded end result is required and so whilst the building type is well known, the specification is likely to be prescriptive. Most projects will involve a combination of performance and prescriptive specifications. Items crucial to the design will be specified prescriptively (such as external cladding) whilst less critical items are specified only by performance (such as service lifts).
Key to deciding whether to specify a building component prescriptively or not, is considering who is most likely to achieve best value, the client, the designers or the contractor:
- Large clients may be able to procure certain products at competitive rates themselves (for example the government).
- Some designers may have particular experience of using a specific product (although some clients may not allow designers to specify particular products as they believe it restricts competition and innovation and may relieve the contractor of their liability for ‘fitness for purpose’).
The contractor may be best placed to specify products that affect buildability.
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