Structure schedule quotes, drafted as a piece list your estimator checks against the plans.

Your estimator reads the schedule and the plan sheets, works out what each row really is, and breaks it into what the plant will cast: a base of some diameter and height, risers to reach depth, a cone or flat top, grade rings, pipe openings at set elevations and angles, and the joints between them. Then comes the specification's load rating and joint material, and a list of everything the drawings don't say.

For the test, AI reads copies of projects you've closed and drafts the piece list row by row: structure number and type, size, rim and invert, the depth that follows, each pipe with its diameter and invert, and the load rating and joint materials the specification names. Every value points back to the sheet or paragraph it came from, and every blank becomes a question. It writes no price and confirms no design.

Every engineer lays the table out differently. Bowie, Maryland's plan checklist wants structure number, type, width, size, station and offset, the city's standard detail number, top elevation and inverts in and out, with structures numbered S-1, M-1, I-1 from the downstream end. A City of Madison, Wisconsin storm sewer schedule from October 2018 instead runs structure, station, offset, type, top of casting, E.I. and depth, with types like H inlet, terrace inlet and 4X4 SAS, its shorthand for a sewer access structure. Depth there is top of casting less E.I., the invert elevation, and the sheet's own notes say top of casting means top of curb for inlets and the flowline of a closed casting for access structures. The draft keeps each schedule's own words and does the subtraction only where its columns allow it.

The schedule and the profile can disagree. That same Madison contract carries an addendum note that a structure's rim and invert text in the profile was revised to match the schedule, and that a field bend was added when the sewer moved away from a stone wall. An estimator who reads only one sheet quotes the wrong piece. The draft takes inverts and rims from every place they appear and lists each row where the two don't match, with both sheet numbers.

Arithmetic can change the product. Plattsburgh, New York's storm drainage specification for its Town Center caps a catch basin at four feet from finished rim to invert out. Above that, or with any pipe over 15 inches, the structure must become a storm manhole, and the manhole's inside diameter is a function of the pipes going in and out. A catch basin needs a 12-inch sump unless a pipe is exactly 15 inches, when nine inches is required, and where several pipes enter one structure their inverts may differ by no more than three feet. When a row's type and its own numbers don't agree, the draft marks it for your estimator and leaves the row as drawn.

The diameter is a rule and then an exception. Knoxville Utilities Board's sewer manhole section, released in October 2021, sets four feet for lines under 18 inches, five feet from 18 to 24 inches and six feet above that, then says sizing depends on the number, location, diameters and deflections of the pipes and has the contractor confirm it. A two-foot or larger drop between intersecting inverts calls for an external drop connection. The same section wants the fewest sections the precaster can provide, none under 16 inches deep, no lifting holes through the structure, two layers of butyl mastic at each tongue and groove joint, channels and benches grouted only at the factory, and a crystalline waterproofing admixture carrying a red pigment for quality assurance. None of that reaches the schedule, and all of it reaches the piece list.

Load and joint language lives in the specification. New York State's master section for concrete manholes gives a load rating of AASHTO HS-20 with an impact allowance and an equivalent soil pressure, joints to ASTM C913, gaskets to ASTM C923 and butyl joint sealant to ASTM C990, and it wants shop drawings to show the size, elevation and relative orientation of every penetration, with field measurements verified before fabrication. Overland Park, Kansas's box culvert section calls for ASTM C1433 barrels designed to at least HS-20 and for construction loads, blockouts cast where the plans show them with the steel cut in the field, watertight lifting inserts located on the shop drawings, and mastic joints throughout. Georgia ties its box barrels to its own Section 513 and AASHTO M259, and ASTM C1577 is the box specification with designs per the AASHTO LRFD bridge specifications. The draft copies the load line and the standard each project names, exactly as written.

What your reviewer will check. The owner names the person who knows these quotes best, usually the chief estimator. They check that every structure made the list with the right type and depth, that every opening has its pipe and invert, that the load rating and joint materials read as the specification words them, and that the question list matches what they would have asked. Put in one job with an addendum and one you declined to quote. No draft line says a structure is adequate; it says what the documents ask for and marks where they fall silent.

When your reviewer says yes, new plan sets get the same draft piece list for about 30 days.

Your estimator reads every list, prices it, changes whatever needs changing and sends the quote the way you send quotes today.

The comparison keeps running through the month. A further job is a separate decision with its own price, and monthly support comes after that.