AEC definitions
A window schedule is a table that identifies each window, storefront, or curtain-wall opening by mark and states its size, type, frame, glazing, and how it operates. Tags on the plans and elevations point to the rows.
Definition
Like a door schedule, the window schedule is the text that the drawing tag is pointing at. Elevations show the opening in the facade. The schedule states whether it is fixed, casement, or a storefront system, what glass goes in it, and which specification section governs. Energy code values, such as U-factor and solar heat gain, often live in the schedule or in a companion glazing schedule because the energy model was built from those numbers.
In depth
A window mark that appears three times on the elevation needs a schedule row that says the quantity, or three rows. Ambush quantities, where the supplier counts the elevations and the schedule states a different count, show up as a change after award.
Existing windows to remain should say so. A mark that looks new and is actually existing will be priced as new.
If the compliance form used a U-factor and an SHGC, those numbers have to be the ones in the schedule the contractor buys. A specification that says 'high performance glass' without the values, and a schedule that has no values either, leaves the bidder guessing which product meets the permit.
Plan-check comments on fenestration often cite this gap. Put the values where the form and the buyer will both see them.
A type elevation shows mullions, operable vents, and sill condition. The schedule's type column points at it. Curtain wall and punched windows should not share a type just because both are aluminum.
Head, jamb, and sill details are separate callouts. The schedule does not replace them. A supplier needs the type, the schedule, the details, and the spec section.
Glass in doors, next to doors, and near walking surfaces often has to be safety glazing under the building code. The schedule should say tempered, laminated, or filmed where that rule applies. A generic 'insulated glass' note does not say it.
The plan location and the schedule note are checked together. A sidelight beside a door that the schedule treats as ordinary vision glass is a comment the plans examiner will write if you do not.
A wider window is an elevation change, a schedule change, a structural opening change if the lintel was tight, and sometimes an energy resubmittal. Clouding only the schedule leaves the elevation someone will fabricate from.
Hardware for operable vents, limiters, and insect screens belong in the schedule or the spec, not in a note on one elevation that the other floors do not share.
Examples
Window type W2 is a 3 foot by 5 foot casement. The schedule lists U-factor 0.29, matching the energy form. The elevation tag W2 on the north face uses that row.
A storefront schedule, separate from punched windows, lists the entry bay. The punch-window schedule does not repeat it.
Sidelights at the lobby doors are marked tempered in the schedule. The floor plan shows them within the safety-glazing zone.
FAQ
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