Signs you need this
- • A facilities director at a hospital or outpatient clinic campus needs a corridor or smoke partition documented to a specific UL design number before an inspector will sign off.
- • A developer converting an old mill building or downtown block into multiple residential units needs an area separation wall between units that meets code, not just a standard partition.
- • An operator of a seafood-processing or cold-storage facility along the working waterfront needs occupancy separation between a processing area and adjoining space.
New Bedford Drywall & Plaster builds fire-rated drywall assemblies, Type X board partitions, shaft wall systems, and 1-hour or 2-hour rated walls, constructed and documented to the specific UL design number an architect’s drawings call for. This is not a heavier version of a standard partition; it is a specific board layer count, fastener schedule, and joint treatment tied to a tested assembly, built so it holds up to inspection by City of New Bedford Inspectional Services under the Massachusetts State Building Code. Every penetration through the wall, an electrical box, a pipe, a duct, has to be firestopped in a way that preserves the rating, not just patched around.
This service is for facilities managers at St. Luke’s Hospital, Southcoast Health’s outpatient clinics, and other healthcare campuses reconfiguring corridors or patient care space that carries a fire and smoke rating requirement. It’s also for developers converting mill buildings or older downtown blocks into multifamily residential units, where an area separation wall between units is a code requirement, not an option, for general contractors on projects where the architect’s life-safety drawings call out specific UL design numbers for corridor walls, shaft enclosures, or occupancy separations, and for owners and operators of seafood-processing and cold-storage buildings along Route 18 and the working waterfront who need fire separation between processing, storage, and adjoining occupancies.
Materials & standards
Products & materials we use
- USG Sheetrock
- National Gypsum Gold Bond
- Type X board
- shaft-wall CH-stud and liner panel
- DensGlass
Standards & codes we work to
- Massachusetts State Building Code (780 CMR, IBC-based)
- UL fire-rated assemblies
- ICC/IBC
- ASTM C1396
- ICRA
What the terms mean
- Type X
- fire-rated assembly
- UL design number
- shaft wall
- rated partition
- area separation wall
- firestop
- corridor and smoke partition
Options & variants
| Option | When it applies | Cost |
|---|---|---|
| 1-hour rated partition | Standard corridor or occupancy separation requiring one-hour fire resistance | Bid from drawings and specified UL design |
| 2-hour rated partition / shaft wall | Stairwell, elevator shaft, or higher-occupancy separation requiring two-hour resistance | Bid from drawings and specified UL design |
| Area separation wall | Wall dividing residential units in a multifamily conversion, built to code minimum | Bid from drawings and applicable code section |
| Corridor / smoke partition | Healthcare or institutional corridor wall carrying both a fire and smoke-resistance requirement | Bid from drawings and specified UL design |
What affects cost
- • The specific UL design number an architect or engineer calls out, which drives the board type, layer count, stud gauge, and fastener spacing.
- • The number and type of penetrations that need firestopping.
- • The wall's tie-in to existing masonry or timber structure common in older mill and downtown buildings.
- • The inspection schedule with City of New Bedford Inspectional Services.
What to expect
- 1
Review the life-safety drawings
New Bedford Drywall & Plaster reviews the life-safety drawings and the specific UL design number called out for each rated wall or shaft.
- 2
Submit a bid
A bid is submitted scoped to the exact assembly, including board layer count, stud spacing, and any shaft wall liner panel system specified.
- 3
Frame and board to spec
Framing and board are installed to the tested assembly's specification, not a general approximation of a rated wall.
- 4
Firestop every penetration
Every penetration, electrical, plumbing, mechanical, is firestopped to a method that preserves the assembly's rating.
- 5
Document and walk with the inspector
The completed wall is documented and walked with the inspector or the general contractor's third-party inspector before it's closed up behind finishes.
When this isn’t the right call
- If the wall is a standard non-rated interior partition with no fire-resistance requirement, metal stud framing and commercial drywall is the better fit.
- If the scope is a suspended acoustical ceiling rather than a fire-rated wall assembly, drop ceiling installation is the better fit.
- If the work is a residential repair rather than a new commercial rated assembly, a residential drywall repair service is the better fit.
Frequently asked questions
How do you know which UL design number to build to? +
The architect or engineer specifies it on the life-safety drawings. New Bedford Drywall & Plaster builds to that exact design, board type, layer count, and fastener schedule included, rather than a general approximation of a rated wall.
Do you work on hospital or clinic projects with fire-rated corridors? +
Yes. Healthcare facilities like St. Luke's Hospital and Southcoast Health's outpatient clinics regularly need corridor and smoke partitions built and documented to a specific rated assembly.
What is an area separation wall and when do I need one? +
It's a fire-rated wall dividing separately owned or occupied units, common in multifamily conversions of older mill buildings and downtown blocks. Code requires it between units rather than leaving it optional.
How do you handle penetrations through a rated wall without losing the rating? +
Every electrical box, pipe, or duct penetration is firestopped using a method that preserves the tested assembly's rating, documented as part of the completed work.
Will the finished wall pass inspection with the City of New Bedford? +
Building to the specific UL design and documenting penetrations correctly is what gets a rated wall through City of New Bedford Inspectional Services inspection under the Massachusetts State Building Code.
Can you build a rated wall that ties into an existing mill building's masonry or timber structure? +
Yes. Older mill and downtown buildings often need a rated partition to tie into existing masonry or structural timber, and that connection detail is built to maintain the assembly's rating at the tie-in point.