Don't pass unanswered questions

Every gap you leave in a drawing goes to someone who knows less about it than you did. Usually that is a person holding a saw. The rule in this chapter comes from a working drafter, and it is the most useful sentence a new drafter will read.

Don't pass unanswered questions through your drawings. Having to cater to the whims of interior designers who have no qualifications other than enjoying Pinterest leaves a LOT of unanswered questions. They don't know how to build it. They don't know how to draw it. They will approve your drawing with the same incomplete/unbuildable design. Their approval, while necessary for contract, is meaningless. If you want to know if your drawings are good, ask the people who have to build from them.

A commenter on r/Millwork, replying to a drafter seven months into the job

Set the tone aside. The claim underneath is testable, and the published documents back it: an approval says the design is accepted, not that the thing can be built. The drafter who asked the original question came back later with the result: "After a year and a half in the field now I've definitely improved a lot and have done what you said and talked to the guys on the shop floor about the construction and what details are important to show on my drawings. It's been a massive help."

What an approval covers, and what it does not

Read what the documents themselves say an approval is for.

• The Woodwork Institute sample set has a note on its specification sheet: "SHOP DRAWINGS MUST INCLUDE ALL ITEMS REQUIRED IN ORIGINAL SPECIFICATIONS. CHANGES FROM THE ORIGINAL SPECIFICATIONS SHALL BE SUBMITTED BY THE FABRICATOR IN A SEPARATE DOCUMENT SIGNED & APPROVED BY THE ARCHITECT PRIOR TO FABRICATION." The cover adds: "ALL INFORMATION INCLUDED IN THE DRAWINGS MUST COMPLY WITH ARCHITECTS ORIGINAL SPECIFICATIONS." A change buried in the drawing is not approved just because the drawing came back stamped.
• The same sample carries a warning down the edge of several sheets: "THESE SHOP DRAWINGS ARE NOT APPROVED AND MUST NOT BE USED BY ANY CONTRACTOR UNTIL THEY ARE APPROVED AND DIMENSIONS ARE VERIFIED. USE OF THESE DRAWINGS WILL BE AT YOUR OWN RISK. ... THESE DRAWINGS ARE FOR SUBMITTAL REVIEW ONLY." Approval and verified dimensions are two separate conditions.
• AWMAC describes its inspection service's shop drawing review as "in addition to the usual review by the Architect", and says the inspector checks "whether or not the methods and materials indicated in the shop drawings ... conform to the specified AWMAC STANDARDS". Methods and materials get their own check, separate from the architect's.
• AWI 100, Submittals, states the purpose of shop drawings: "the means by which the design intent is turned into reality". The architect's job in review is design intent. Buildability is yours.

So an approval records one thing reliably: the client and the design team accepted what they could see. It does not certify that the parts exist, that the dimensions close, or that the joint in detail F can be machined. A reviewer who does not build cabinets cannot find the hole in a cabinet drawing. The stamp goes straight past the problem, and the problem stays with whoever drew it.

What silence means under the standards

When your drawing says nothing, the standards fill the gap, and they mostly hand the decision to the shop.

• AWS 2nd Edition, Section 10: "In the absence of specifications; methods of fabrication shall be manufacturer's choice."
• AWS 2, on construction and door interface: "FLUSH OVERLAY is the default for either FRAMELESS or FACE FRAME casework", and "SELECTION shall be manufacturer's choice, unless specified otherwise."
• AWS 1st Edition, default stipulation: "If not otherwise specified or indicated, all work shall be Custom Grade".
• AWS 2, concealed surfaces: "the manufacturer's choice" at every grade.

That is fair to the shop. It is a trap for the designer who assumed otherwise, and it is the drafter who can see both sides. If the designer's rendering shows a flush inset door and the spec says nothing, the AWS 2 default is flush overlay, not flush inset. Your drawing decides it. Draw it one way or the other, and make sure the choice is visible and asked about.

Where questions hide

These are the places a millwork package most often carries a question nobody asked. Each comes with the check that finds it.

Dimensions that do not close

Add the parts. Compare with the overall. A worked example: a run of cabinets is 600 + 900 + 900 + 447 mm, which sums to 2,847 mm. The opening on the architect's plan is 2,840 mm. That 7 mm is a question. On site it becomes a scribe somebody cuts without telling you, or a filler that was never priced. Either the opening is wrong, a cabinet shrinks, or the plan dimension was never verified.

The same check applies vertically: toe kick plus carcass plus top thickness must equal the counter height, and the counter height must match what the spec or the code requires (Chapter 22).

Anything drawn with no thickness

A reveal drawn as a single line. A shadow gap that implies a rebate nobody specified. A mitre drawn as a line where two materials meet. A "floating" shelf with no visible support. If the designer's drawing implies a construction it does not describe, the construction is still undecided. Under the standards, undecided means manufacturer's choice.

Check: for every line on the design elevation that could be a joint, can you point to the section that shows how it is built?

Hardware named but not located

Naming a hinge does not position it. A schedule that says which hinge but not how many per door, which boring pattern, or which side it hangs on, is half an answer. Either give the setting-out, or state in a note that setting-out follows the manufacturer's instructions and is the shop's. Do not leave it ambiguous. Hardware setting-out is where a single wrong number repeats across every door in a batch.

A LinkedIn article on millwork submittals by Anuj S. lists as a common mistake: "Omitting hardware details or using 'TBD'". A TBD on a submittal is a question you already know about. Send it as one.

Site conditions you have assumed

Every dimension taken from the architect's plan rather than measured on site is an assumption. Mark it. A VIF (verify in field) note on a dimension is a real answer. It says who checks it and when. A plain number that happens to be wrong is not.

The standards give installers limits here. AWS 1st Edition, Section 10: wall, ceiling or opening variations "in excess of 1/4" (6.4 mm) or FLOORS in excess of 1/2" (12.7 mm) in 144" (3658 mm) of being plumb, level, flat, straight, square, or of the correct size are not acceptable for the installation of architectural woodwork, nor is it the responsibility of the installer to scribe or fit to tolerances in excess of such." If your scribe allowance assumes a better wall than that, say so on the drawing.

The junction with another trade

Where your work meets stone, tile, plasterboard, flooring, electrical or plumbing, someone owns the tolerance and someone installs first. If your set does not say who, each trade can reasonably assume it is the other.

The Woodwork Institute sample shows how to close this down. Its general notes assign each interface: "PLUMBING/FIXTURES BY OTHERS", "ELECTRICAL/FIXTURES BY OTHERS", "PAINTING/FINISHING BY OTHERS", "ALL BLOCKING FOR CABINET ANCHORAGE IS BY OTHERS", "ALL RUBBER, VINYL, OR FINISH BASE TO BE SUPPLIED BY OTHERS". Its stair section labels each part by owner: "MILLWORK" for treads and risers, "(BY OTHERS)" for the railings, the stringers, the metal framing and the gypsum board. Every line tells a reader whose problem it is.

The standards also place anchorage outside the woodwork scope. ANSI/AWI 0641 excludes "in-wall blocking, backing, furring, brackets, or other anchorage that become an integral part of the building's walls, floors, or ceilings". If the blocking is not on the architect's drawings, your cabinet has nothing to fix to. That is a question to ask before install, not during it.

Specification items the drawings ignore

The spec calls for a grade, a standard, a finish, a certification. The drawings show something else, or nothing. Read the spec before you draw (Chapter 9). The Woodwork Institute sample treats this as a sheet of its own: a specification requirements form covering case body, shelves, hardware, door and drawer fronts, drawer boxes and countertops, each with core material, edgeband, and exposed and semi-exposed faces.

Design intent that fights the grade

A rendering with continuous grain across a wall of doors on a job specified Premium only. AWS 2 says Premium sequencing between units "must be so specified". The rendering is not a specification. See Chapter 20.

Code conflicts

A reception desk drawn at one height throughout when one length of it must be 36" maximum. A knee space too narrow. A wall cabinet protruding into a corridor. See Chapter 22.

The three moves

1. Write the question down and send it

An RFI costs a day of waiting. A wrong guess costs a rebuild. Write the question so it can be answered with one word or one number, reference the sheet and detail, and propose an answer. Chapter 24 covers the format.

2. If you must proceed, draw the assumption where approval will see it

Sometimes the schedule will not wait. Then draw your best answer and label it as an assumption, on the sheet, next to the thing it governs, and again in the general notes. An assumption the reviewer can see is an assumption the reviewer accepted or rejected. An assumption hidden in a clean line is one the reviewer never saw. The Woodwork Institute note quoted above is the reason: changes from the specification need a separate signed document. An unmarked change in a drawing does not count as one.

3. Walk the set to the floor before it goes out

The r/Millwork advice is the last line of the quote: "If you want to know if your drawings are good, ask the people who have to build from them." The drafter who took it reported that talking to the shop floor about "what details are important to show on my drawings" was "a massive help". The machinist and the bench hand will read your sections the way they will use them. They will find in minutes the thing a reviewer will not find at all.

A worked pass through one elevation

An example, not a real job. A designer's elevation shows a 3,000 mm wall of base and wall cabinets in walnut veneer, with a 3 mm reveal between every door, flush toe kick, integrated LED under the wall units, and a stone top. The spec names Premium grade. Walk it:

What you see	The question	Who answers
3 mm reveals throughout	Does 3 mm fit inside the grade's gap tolerance, and is it door-to-door or door-to-carcass too?	You, from the standard; architect confirms intent
Grain appears continuous across all doors	Is sequencing between units, or a blueprint match, required? Premium alone does not give it	Architect
Flush toe kick	Toe kick height, material, finish, and who supplies the floor base	Architect; spec
LED under wall units	Driver location, cable route, switch, who supplies and connects	Electrical trade; architect
Stone top	Thickness, overhang, support, who templates and who installs first	Stone trade; GC
Wall length 3,000 mm on plan	Measured or drawn? Mark VIF, state scribe allowance	Site measure
Wall cabinets over counter	Is any storage here required to be accessible?	Architect (Chapter 22)

Seven questions from one elevation. Each one is cheaper as an RFI than as a site problem.

What this is not

This is not a licence to send a hundred RFIs a week. A question the documents already answer, asked anyway, trains the architect to skim your RFIs. Read the documents first: drawings, specification, schedules, addenda. Then ask what they do not answer. And ask it once, clearly, in writing.

Sources

• r/Millwork, "Millwork drafting" thread (saved copy in the project's source folder). The quoted comment and the original poster's reply after a year and a half. Reported.
• Woodwork Institute sample shop drawings, 26 sheets, watermarked SAMPLE. The specification-change note, the cover note on compliance with the original specifications, the submittal warning, the "BY OTHERS" general notes and the stair section labels. Document.
• AWI 100, Submittals, purpose statement, awinet.org. Primary.
• ANSI/AWI 0641-2019, scope exclusion of in-wall blocking and anchorage, awinet.org. Primary.
• AWMAC, Guarantee and Inspection Service page, awmac.com. Second shop drawing review in addition to the architect's. Primary for the programme's scope.
• Architectural Woodwork Standards, 1st Edition (2009) and 2nd Edition (2014), Section 10, Woodwork Institute web copies. Manufacturer's choice in the absence of specification; default Custom grade; installation tolerances for walls and floors; sequencing must be specified. Superseded. Primary (superseded edition).
• Anuj S., "What Supporting Documentation Is Typically Required with Millwork Drawings?", LinkedIn. "Omitting hardware details or using 'TBD'" as a common mistake. Reported.

The 2,847 mm run and the walnut elevation are invented examples, labelled as such.