Core References And Hold Points
This batch adds practical reference checks and clean foreman questions for pressure class, seal class, gauge checks, fire/smoke damper hold points, access, supports, seismic bracing, coordination conflicts, RFI language, and closeout.
Building light-class duct on a high-class run; seal/support fails
TDC, Ductmate, Flanges & GasketsSeal Class A/B/CYellow / Check First · 2ndUnder-sealing a high seal-class run; fails leakage test
TDC, Ductmate, Flanges & GasketsReading Duct Gauge Off The SpecYellow / Check First · 2ndWrong gauge for the size/pressure class; too light oil-cans and leaks
TDC, Ductmate, Flanges & GasketsCross-Breaking And BeadingGreen / Field Check · 2ndPanel oil-cans, rattles, or fails a rigidity check
TDC, Ductmate, Flanges & GasketsInternal Tie RodsYellow / Check First · 3rdMissing rods, wrong spacing, no grommet so it leaks/rattles
TDC, Ductmate, Flanges & GasketsReading A Duct Size CalloutGreen / Field Check · 1stBuilding it rotated (12x24) so it doesn't fit the space
TDC, Ductmate, Flanges & GasketsDuct Offset Direction On PlanGreen / Field Check · 2ndBuilding the offset the wrong direction and hitting steel/pipe
TDC, Ductmate, Flanges & GasketsTying New Duct To ExistingYellow / Check First · 3rdMismatch in size or class; leaks or restriction at the joint
Fire/Smoke Dampers, Rated Assemblies & AccessIs It A Balancing Damper Or A Fire Damper?Red / Stop And Verify · 2ndTreating a fire damper as a balancing damper (or vice versa)
Fire/Smoke Dampers, Rated Assemblies & AccessDamper Mounting Position LimitsRed / Stop And Verify · 3rdMounting outside the listed orientation
Fire/Smoke Dampers, Rated Assemblies & AccessFire Damper Sleeves And BreakawayRed / Stop And Verify · 3rdWrong sleeve gauge, non-breakaway joint, angles missing
Fire/Smoke Dampers, Rated Assemblies & AccessAnnular Space And AnglesRed / Stop And Verify · 3rdWrong clearance, missing angles, no expansion allowance
Fire/Smoke Dampers, Rated Assemblies & AccessAccess At Every Fire/Smoke DamperRed / Stop And Verify · 3rdNo access door; can't reset link/actuator; inspection fail
Fire/Smoke Dampers, Rated Assemblies & AccessCombination Fire/Smoke DampersRed / Stop And Verify · 4thActuator scope confusion, wrong fail mode, linkage/travel wrong
Fire/Smoke Dampers, Rated Assemblies & AccessIdentifying A Rated Wall/FloorRed / Stop And Verify · 2ndPenetrating a rated barrier without a damper/firestop
Fire/Smoke Dampers, Rated Assemblies & AccessDuct Firestop At PenetrationsRed / Stop And Verify · 3rdWrong/missing firestop, wrong system, scope confusion
Fire/Smoke Dampers, Rated Assemblies & AccessNever Defeat A Life-Safety DamperRed / Stop And Verify · 1stPropping/wiring/blocking it — life-safety violation
Fire/Smoke Dampers, Rated Assemblies & AccessWhere Access Doors Are RequiredYellow / Check First · 2ndMissing access, door on wrong side, too small
Fire/Smoke Dampers, Rated Assemblies & AccessSizing Access For The TaskYellow / Check First · 2ndDoor too small to reset a link or pull a coil
Fire/Smoke Dampers, Rated Assemblies & AccessCeiling Access Panels CoordinationYellow / Check First · 3rdNo ceiling access aligned to the duct door
Hangers, Supports, Anchors & FastenersAttaching Hangers To StructureRed / Stop And Verify · 2ndAttaching to the wrong member/deck flute; overload
Hangers, Supports, Anchors & FastenersConcrete Anchors For HangersRed / Stop And Verify · 3rdWrong anchor, shallow embedment, cracked/PT slab hit
Hangers, Supports, Anchors & FastenersSizing Allthread (Rod)Yellow / Check First · 2ndUndersized rod; overload; failure
Hangers, Supports, Anchors & FastenersBeam Clamps And Load RatingRed / Stop And Verify · 2ndOver-rated load, no retaining strap, wrong flange
Hangers, Supports, Anchors & FastenersStrap Hangers Vs TrapezeGreen / Field Check · 2ndWrong method for size/weight; undersized strap
Hangers, Supports, Anchors & FastenersIndependent Support RuleYellow / Check First · 1stPiggybacking loads on other trades; overloads/violations
Seismic Bracing, Sway Control & Structural CoordinationWhen Seismic Bracing Is RequiredRed / Stop And Verify · 3rdMissing bracing where required; inspection/life-safety fail
Seismic Bracing, Sway Control & Structural CoordinationTransverse Vs Longitudinal BracingRed / Stop And Verify · 3rdWrong direction/spacing; brace ineffective
Seismic Bracing, Sway Control & Structural CoordinationSeismic Anchors And AngleRed / Stop And Verify · 3rdWrong anchor/angle; brace can't take seismic load
Seismic Bracing, Sway Control & Structural CoordinationSeismic Clearance At PenetrationsRed / Stop And Verify · 3rdNo clearance; duct binds or damages barrier in an event
QA/QC, Punchlist & Inspection ReadinessDamper Closeout ChecklistRed / Stop And Verify · 3rdMissing/inaccessible/defeated rated dampers at closeout
QA/QC, Punchlist & Inspection ReadinessGetting A Duct Inspection ReadyYellow / Check First · 3rdFailing rough inspection; missing access/support/seal
Coordination, RFIs & Other TradesClearance To Sprinkler HeadsRed / Stop And Verify · 2ndBlocking sprinkler coverage; life-safety/inspection fail
Coordination, RFIs & Other TradesClearance To Electrical GearRed / Stop And Verify · 2ndDuct in dedicated electrical space; code violation
Coordination, RFIs & Other TradesNever Cut/Notch StructureRed / Stop And Verify · 1stCutting/notching structure; serious safety/liability
Coordination, RFIs & Other TradesHow To Ask A Good Field QuestionGreen / Field Check · 1stVague questions waste the foreman's time; wrong answer
Coordination, RFIs & Other TradesWhen To Ask An RFIYellow / Check First · 3rdField-guessing where an RFI was needed; rework/liability
Coordination, RFIs & Other TradesCoordination (BIM) DrawingsYellow / Check First · 3rdBuilding off the base plan instead of coordinated set
Coordination, RFIs & Other TradesDuct Elevations And BOD/TODYellow / Check First · 2ndBuilding at wrong height; clash with other trades
Coordination, RFIs & Other TradesReading A Mechanical PlanGreen / Field Check · 1stMisreading scale/tags; building wrong location/size