How to Read a Door Schedule for Metal Door Projects: A Buyer’s Checklist

For a commercial, industrial or public-building project, a door quotation is only as accurate as the information supplied with the enquiry. A list showing width, height and quantity may appear sufficient, but it leaves many important questions unanswered. Frame depth, wall construction, opening direction, hardware preparation, finish and required performance can all affect the design, cost and lead time of a metal door.

A clear door schedule helps the buyer, contractor and supplier work from the same information. It also makes quotations easier to compare. This guide explains the key fields that importers, developers and project procurement teams should check before sending a metal door schedule to a supplier.

1. Start with a unique door mark

Every opening should have a door mark, such as D01, D02 or FD-101. The same mark should appear on the architectural drawing and in the door schedule. If ten openings share the same specification, they may use one mark with a quantity of ten. If the dimensions, handing, finish or hardware change, create a separate mark.

Clear door marks make technical questions much easier to track. Instead of discussing “the steel door on the second floor,” both parties can refer to “D12.” This reduces confusion during drawing approval, production, packing and site installation.

2. Separate structural opening size from finished door size

One of the most common quotation problems is an unclear size. A schedule may show 1000 × 2100 mm without stating whether this is the structural opening, the outside frame size or the door leaf size. These measurements are not interchangeable.

For each door mark, identify:

• structural or rough opening size;
• required outside frame size, if already confirmed;
• clear opening requirement, when access or equipment movement is important;
• single-leaf or double-leaf configuration;
• active and inactive leaf widths for unequal double doors.

The supplier should confirm how installation clearance and frame profiles affect the final leaf size. For renovation projects, actual site measurements are especially important because existing openings may not match the drawings.

3. Confirm wall construction and finished wall thickness

A frame must suit the wall it will be installed in. Concrete, blockwork, steel structure, sandwich panel and drywall partitions can require different frame profiles or fixing methods. The schedule should therefore show both the wall type and the finished wall thickness.

Do not rely only on the nominal wall thickness. Tiles, plaster, stone, acoustic layers or decorative panels can increase the finished dimension. If the wall finish varies between the two sides, provide a section drawing. A supplier can then review the frame depth, architrave or trim arrangement and fixing position before production.

4. Define handing and opening direction

Handing mistakes are costly because they can affect the hinge preparation, lock position, closer installation and door swing. A simple “LH” or “RH” notation is not always enough: handing conventions vary between countries and companies.

The safest method is to include a small plan-view diagram showing the hinge side and swing direction. Also state whether the door opens inward or outward and whether any leaf must remain inactive. For corridor, escape-route or plant-room doors, confirm the required direction with the project consultant before approving production drawings.

5. Specify the door and frame material clearly

“Metal door” is a broad description. The schedule or technical specification should identify the material expected for the leaf and frame, such as galvanized steel or stainless steel, together with any required grade or thickness.

Material selection should reflect the location and use of the opening. An internal service-room door and an external coastal door may require different corrosion considerations. Stainless steel can be appropriate for certain hygienic or corrosive environments, while coated steel may offer a more economical solution for many general project applications.

If the specification does not define a material thickness, ask the supplier to state the proposed construction in the quotation. This avoids comparing offers that look similar but are based on different structures.

6. Describe the finish, color and appearance

For powder-coated doors, provide the required color reference when available. A written color name such as “grey” can be interpreted in several ways, while a recognized color code or approved sample gives a clearer target. Also indicate whether the frame and leaf use the same finish.

For stainless steel doors, specify the surface appearance required, such as a brushed finish, and request a sample if appearance is critical. If the project needs vision panels, louvers, kick plates or decorative grooves, show their sizes and positions on an elevation drawing.

Color samples can look different under various lighting conditions and screens. Final approval should therefore follow the agreed project procedure rather than relying only on a phone image.

7. Build a hardware set for each door type

Hardware should be coordinated as a complete set, not selected item by item without checking compatibility. A typical set may include hinges, a lock or latch, handles, a closer, seals, a door stop and, for double doors, a coordinator or bolts. Some projects also require access-control preparation, electric strikes, magnetic contacts or cable transfer devices.

The buyer should clarify whether hardware will be:

• supplied and installed by the door manufacturer;
• supplied loose with the doors;
• purchased locally and fitted on site;
• provided by another nominated brand.

If hardware is purchased separately, send datasheets or physical samples early. The door and frame may need reinforcement, cut-outs, fixing holes or wiring preparation before finishing. Late hardware changes can cause rework and delay.

8. Treat performance requirements as project-specific

Some metal doors are required to provide fire resistance, acoustic control, blast resistance, weather resistance or other special performance. These terms should never be used as general marketing labels in a technical order. The required standard, classification, test evidence and permitted construction must be confirmed for the destination market and project.

Ask the consultant or local authority which documents are acceptable before placing the order. A test report for one door configuration does not automatically cover every size, vision panel, hardware set or installation condition. The supplier should review the requested configuration against the available documentation and clearly identify any gap or deviation.

This approach protects both sides: the buyer avoids assuming unsupported performance, and the supplier avoids promising a rating that has not been verified for the ordered design.

9. Add quantity, location and packaging information

Quantities should be listed by door mark, not only as one total number. Include the building, floor or zone when it helps organize delivery. Large projects may benefit from phased production and packing by installation area.

For export orders, discuss packaging before the quotation is finalized. Door size, finish, glass, hardware and transport method influence the packing design. Clearly numbered packages and matching packing lists can save time when containers arrive at a busy project site.

The enquiry should also include the destination port or delivery location, preferred trade term and target delivery date. These details help the supplier evaluate production planning and provide a more realistic shipping proposal.

10. Request drawings and a deviation list before approval

Before production, the final information should be converted into coordinated shop drawings or technical confirmation sheets. Review dimensions, wall interface, handing, elevations, hardware preparation and finish for every door type.

If the supplier’s proposal differs from the specification, request a written deviation list. A transparent deviation list is more useful than a low quotation that silently excludes important items. Only approved information should be released for production, and later changes should be recorded with a revision number.

Information to send for a faster quotation

To receive a clear and efficient proposal, send the following information together:

1. Door schedule with unique marks and quantities
2. Architectural plans and door elevations
3. Structural opening sizes and finished wall thicknesses
4. Wall construction and proposed fixing method
5. Handing and swing diagrams
6. Leaf and frame material requirements
7. Finish and color references
8. Hardware sets and access-control requirements
9. Applicable performance standard and required supporting documents
10. Destination, delivery target and preferred trade term

When part of the information is not yet decided, mark it clearly as “to be confirmed.” This allows the supplier to identify assumptions rather than building them invisibly into the price.

Work with a project-focused door supplier

Metal door procurement involves more than selecting a model from a catalogue. Accurate coordination at the enquiry stage can reduce revisions, prevent incompatible hardware, improve packing organization and support a more stable delivery schedule.

Shenghao Doors works with importers, contractors, developers and project buyers on customized door solutions. OEM and ODM support can be discussed according to drawings, quantities and project requirements. Product performance and supporting documentation are reviewed against the specific configuration instead of being assumed from a general product name.

For a faster quotation, send your door schedule, drawings, quantity, hardware requirements and destination to Shenghao Doors. Visit shenghaodoors.com to discuss your project and receive a configuration-based proposal.