Preqonn AIStep 01
Perimeter sealant.
The full outside boundary of the storefront, head to sill, jamb to jamb, including transitions at adjacent assemblies.
1,720 LF
1/2" joint
Dow 795 · class 50
Elevations map to the right system family. Every lite gets its glass type. Sealant and SSG count themselves. Signed by a senior estimator.
Thirty lites. Six coatings. Three IGU thicknesses. One wrong surface number on a low-E coating and the long-lead order gets re-fabricated. We resolve vision vs. spandrel, tempered vs. laminated, fritted vs. clear, IGU thickness, and argon fill for every lite on every elevation.
Six things estimators redo on every storefront bid. Six things Preqonn AI does once, signed.
Storefront is drawn schematically. You derive framing LF, mullion counts, door cut-outs, and lite sizes by hand from elevations plus jamb/head/sill details - for every bay.
Reads the elevation, the head, the jamb, the sill, the door details. Returns vertical and horizontal mullion LF, daylight openings, and door cut-outs per bay.
Wrong low-E coating surface, missed tempered location, laminated where the spec called acoustic. The first time you find out is at performance mock-up, after the long-lead order shipped.
Maps every lite to vision or spandrel, tempered or laminated, fritted or clear, with low-E coating surface, IGU thickness, and argon fill. Cited to the glass schedule line.
The elevation never says Kawneer or YKK. You read profile depth, sight-line, thermal break detail, gasket geometry, and infer the family. Wrong family means wrong cost basis.
Reads profile geometry, thermal break callout, and spec'd performance to match the system family - Kawneer Trifab, YKK YES, Vistawall, Tubelite, EFCO - and the right thermal-break variant.
Perimeter sealant, vertical mullion butt-joints, horizontal mullion joints, transitions at adjacent assemblies. Counted three different ways, each producing a different number.
Perimeter, vertical butts, horizontal joints, transitions - pulled from details and totaled. Structural silicone joint width and butt-joint LF separated for ASTM C1401 sizing.
ASCE 7 corner zones drive different pressures on every elevation. ASTM E1300 glass-strength check runs per lite size. Most teams pick the worst case and over-buy.
Applies ASCE 7 design pressure by elevation zone, then runs ASTM E1300 glass-strength against each lite size. Flags under-strength lites; right-sizes the rest.
Thermal break LF, U-factor, SHGC, condensation resistance. ASHRAE 90.1 prescriptive vs. performance path. You chase NFRC sheets across three submittal binders.
Pulls U-factor, SHGC, VT against ASHRAE 90.1 climate-zone targets. Thermal-break LF tied to the spec'd variant. NFRC label references attached to each line.
Kawneer Trifab. YKK YES. Vistawall. Tubelite. EFCO. The right family is in the geometry, the thermal break, and the spec'd performance. Preqonn AI fingerprints the elevation and returns the family plus the correct thermal-break variant.
Perimeter, vertical mullion butts, horizontal mullion joints, transitions. Watch the LF sum itself.
The full outside boundary of the storefront, head to sill, jamb to jamb, including transitions at adjacent assemblies.
Structural silicone butt-joints at every vertical mullion. ASTM C1401 sizes the joint to the design wind pressure.
Horizontal joint sealant at every floor-line and intermediate rail. Different sealant class for vision vs. spandrel transitions.
All stages summed, with structural silicone LF separated for fabrication and a transition LF callout at adjoining wall and roof assemblies.
Auto-checked against the codes that actually drive storefront rework. Every flag links back to the spec section and the sheet reference.
Storefront-specific, asked by every estimator who's run one before.
20-minute demo. Bring a real elevation set. We'll run it through Preqonn AI and walk the glass matrix, the framing LF, and the sealant total.
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