Dimensions and alignments are often shown in architectural plans, but there's still a lot of interpretation and latitude on means and techniques of construction. This is an example of our sketch for the fabricator showing how to use a hidden weld technique on a custom door handle made of cut steel bars.
Nothing kills quality as much as a misunderstanding during the bid phase. In addition to collecting and reviewing subcontractor bids, we do our own take-offs and share them with subs after obtaining their proposals. We do this to make sure each sub has included all areas, details and phases for their portion of work. If they've provided a lump sum proposal and discover a take-off discrepancy during installation it's too late too change course and someone has to compromise. We try to prevent this and at the same time we get to calculate and monitor price/unit and ensure fair pricing vs. expected quality.
You only get one chance to rough in an item. If you discover something needs to be moved at the end of the project, chances are, framing members, insulation, or costs of patching will prevent you from moving it. We plan rough-ins based on final product specifications such as these electric meter, disconnect, and solar panel boxes. When the boxes arrive on site the rough-ins allow the boxes to be evenly spaced and centered on the section of wall.
It can be tricky connecting the dots between plans and elevations to truly understand how things look in 3D. Rather than simply handing the plans off to framing subcontractors, we think through the framing ourselves and produce notes and interpretations like these. Prior to construction we meet with the framers to discuss each person's interpretations and ask architects for clarification on details.