Prerock & Shaft Wall Takeoff Services for Schedule-Critical Scopes

The First Board on the Job Deserves Its Own Line Items

Prerock and shaft wall go in before the rest of your scope, on someone else's schedule: the plumber needs the prerock behind the tubs, the elevator installer needs the shaft closed. If your estimate buried these quantities inside the general board number, you will mobilize twice and eat the trips. We take them off separately so you can price the early mobilization, the different crew, and the different material honestly.

• 1" shaftliner panels for shaft wall and area separation walls
• C-H studs, C-T studs and E-studs by size and gauge
• J-track top and bottom, jamb and head conditions at doors
• 1-hour and 2-hour shaft assemblies matched to their listings
• Elevator shafts, stair shafts, mechanical and trash chases
• Prerock at tub and shower surrounds before units set
• Prerock at plumbing walls, party walls and draft stops
• Column and beam fireproofing enclosures where board-wrapped

Rated Assemblies, Taken From the Listings

Shaft wall is a listed system, not a pile of parts. Panel type, stud spacing, face layers and fastening all come from the tested assembly on the life safety drawings. Our estimators quantify to the listing shown, and when the drawings reference an assembly the details contradict, we flag it in writing so you can RFI it before it becomes your problem at inspection.

Multi-Family and Commercial Both

On podium apartments and townhomes, area separation walls and party wall prerock drive the early schedule. On commercial towers, elevator and stair shafts do. We estimate both weekly. Quantities arrive organized by shaft, by building or by floor, in Excel, PDF or CSV, within 24 to 48 hours standard, revisions free within 48 hours.

Frequently Asked Questions