How to Read Commercial Door Schedules

Start with the opening mark

A commercial door schedule connects a tagged opening on the plan to its door, frame, hardware, and other requirements. Start with the opening mark, not the room name. Two doors serving one room can have different sizes, swings, materials, or hardware. A door type such as A describes a configuration; it may be used at many separate openings.

Confirm that you have the current plan, schedule, door and frame elevations, hardware schedule, specifications, and addenda. Follow the drawing-set legend for abbreviations. HM often means hollow metal, but a material abbreviation alone does not identify the complete product or finish.

The Steel Door Institute SDI 111 details include door, frame, hardware schedule guidance and a handing chart. Use these to understand terminology, then follow the project-specific documents.

Read one sample schedule row

The following row is fictional. It demonstrates how information connects, not an approved opening or a universal schedule format.

A 3-foot door width is not a 3-foot rough opening. Door leaf size, frame outside dimensions, frame throat, wall thickness, and rough opening are different measurements. Obtain the required opening dimensions from the coordinated frame detail and supplier information before laying out framing. Do not add a customary allowance without confirming this particular frame.

Follow the frame and hardware references

Trace F1 to the frame elevation and detail. Check the frame profile, wall condition, anchorage, head and jamb relationship, and adjacent finishes. A frame in an existing masonry opening can need different preparation from a frame installed as a new stud wall is built. The same door size does not make those conditions interchangeable.

Next open HW-05. The hardware set may identify hinges, lock or latch, closer, stops, seals, thresholds, or electrified components, but carry only what the project actually specifies. Check mounting and preparation requirements against the door and frame. Record who supplies, installs, wires, and commissions any electrified work instead of assuming it belongs to one trade.

For labeled openings, confirm the complete specified assembly, compatible components, and approved documentation. An empty schedule cell is a question to resolve, not evidence that no requirement applies. This reading exercise does not determine code compliance.

Verify handing from a consistent reference side

Read the swing shown on the plan together with the schedule entry. LH, RH, LHR, and RHR distinguish hinge side and swing under the convention being used. Looking from the opposite side can reverse your apparent left and right. Establish the same reference side used by the project and supplier before assigning a hand.

The Door Handing Guide explains BidSimp's common U.S. commercial convention with diagrams. Practice in the Door Handing Trainer, then compare the actual plan swing, schedule, and hardware requirements. Pairs, double-acting doors, and unusual hardware need their own review; do not force them into a single-door shortcut.

If D101 appears LH in the schedule but the plan suggests a different hand, record both references and request clarification. Silently choosing one can create an incorrect door or hardware order.

Separate opening counts from component counts

Suppose a small plan contains D101 and D102 as single doors plus D103 as a pair. That is three openings and four leaves, assuming the pair has two leaves. It is not four complete single-door assemblies. Count the paired frame as the frame assembly shown and review active/inactive leaf hardware from its set.

Use an opening-by-opening list: mark, room, quantity, door type and size, frame type, hand, hardware set, rating requirement, detail references, and open questions. Reconcile every scheduled opening with the plan, including demolished, existing-to-remain, relocated, and new work. A schedule entry alone does not mean a new installation belongs in the bid.

The Door Field Takeoff tool helps record openings and field conditions. It is not an automatic schedule reader. Keep the document references with your takeoff so a changed hardware set or opening can be traced.

Check the scope before pricing the openings

• Compare the plan opening count to the schedule and explain any difference.
• Verify the frame throat and wall assembly at each condition. Use the wall-types guide to trace that assembly.
• Separate supply, installation, demolition, protection, patching, painting, and electrical responsibilities.
• Record approved substitutions and revisions instead of mixing old and current product information.
• Ask the supplier to quote identified openings and hardware sets so omissions remain visible.

A complete door takeoff is a coordinated list of assemblies and responsibilities. It becomes priceable when the supplier and installer can identify what is included at each opening without guessing.