Role of Construction Documents in successful Installation of structure
General construction documents contain full information regarding structural members, their details and complete set of shop drawings for fabrication purpose. Notes concerning changes or differences from the original documents should be made on the shop drawing for the architect and engineer approval. Ultimately, they are responsible for changes in these drawings and should have the opportunity to analyze any modifications.
A dialogue should occur between the fabricator and the architect and engineer about any areas needing clarification. Successful installations are the result of collaboration between the designer, fabricator and contractor.
Dimensions, manufacturing conventions and special fabrication instructions should be included on the shop drawing. It should be clear to fabrication personnel what will be manufactured from the shop drawings alone. The construction documents are rarely used as a reference in fabrication, with the fabricators relying on the shop drawing for all information.
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Most jobsite dimensions, such as the dimensions between two surfaces on the jobsite, need to be verified. A dimension may be shown on the construction drawings, but the actual dimension may vary, from very small to large increments, depending on jobsite conditions. It is extremely important that the fabricated item arrive on the jobsite ready to be installed without field modification. Special care must be taken by the contractor to measure and verify dimensions.
In new construction, plan dimensions usually are sufficient for ordering many fabricated items such as structural steel or precast concrete.
In remodeling and renovation work, it is essential that field dimensions be verified prior to fabrication. Some fabricators, such as cabinet and casework suppliers, prefer not to rely on the contractor verification and will verify the dimensions with their own and so on.
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