Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Operable Partitions
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### Operable partitions are movable interior walls suspended from an overhead track; they are distinguished from fixed partitions by their ability to be opened and stacked, and from coiling doors by their flat, full-height panel construction. {note}
−### The system shall consist of individual or paired panels, an overhead support track, panel-to-panel and perimeter seals, bottom and top closures, and the suspension hardware required for the specified operation. {note}
+### The system shall consist of individual or paired panels, an overhead support track, panel-to-panel and perimeter seals, bottom and top closures, and the suspension hardware required for the specified operation.
### The performance of an operable partition is governed as much by the building structure and adjacent construction as by the partition itself; the supporting structure, ceiling plenum, and floor flatness are integral to the rated performance and are addressed by this standard. {note}
−### The Contractor shall provide a complete, operational partition system including all panels, track, hardware, seals, closures, and accessories required for the operation and acoustic performance specified, whether or not each item is individually described. {note}
+### The Contractor shall provide a complete, operational partition system including all panels, track, hardware, seals, closures, and accessories required for the operation and acoustic performance specified, whether or not each item is individually described.
## Work specified elsewhere {toc}
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## Action submittals {toc}
−### The Contractor shall submit the following action submittals for review before fabrication: {note}
+### The Contractor shall submit the following action submittals for review before fabrication:
- Product data for each partition type, including panel construction, weights, seal types, and tested STC and fire ratings
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```
−### Shop drawings shall show the stacking-pocket width, depth, and height with the stored panel stack dimensioned to confirm fit. {note}
+### Shop drawings shall show the stacking-pocket width, depth, and height with the stored panel stack dimensioned to confirm fit.
−### Shop drawings shall note the maximum permitted deflection of the supporting structure so that the structural engineer of record can confirm the framing satisfies it. {note}
+### Shop drawings shall note the maximum permitted deflection of the supporting structure so that the structural engineer of record can confirm the framing satisfies it.
## Closeout submittals {toc}
−### The Contractor shall submit the following closeout submittals before final acceptance: {note}
+### The Contractor shall submit the following closeout submittals before final acceptance:
- Operation and maintenance manuals covering panel operation, seal adjustment, and track cleaning
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## Informational submittals {toc}
−### The Contractor shall submit the following informational submittals: {note}
+### The Contractor shall submit the following informational submittals:
- Qualification data for the manufacturer and the installer
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## Manufacturer and installer requirements {toc}
−### The manufacturer shall be a firm regularly engaged in the production of operable partition systems with a documented record of the specified product type. {note}
+### The manufacturer shall be a firm regularly engaged in the production of operable partition systems with a documented record of the specified product type.
−### The manufacturer shall have produced operable partitions of the specified type and rating for not less than five years. {note}
+### The manufacturer shall have produced operable partitions of the specified type and rating for not less than five years.
−### The installer shall be trained, certified, or approved in writing by the partition manufacturer. {note}
+### The installer shall be trained, certified, or approved in writing by the partition manufacturer.
−### A single manufacturer shall furnish the panels, track, hardware, and seals as a complete system to maintain the tested acoustic and fire ratings. {note}
+### A single manufacturer shall furnish the panels, track, hardware, and seals as a complete system to maintain the tested acoustic and fire ratings.
### Mixing seals, hardware, or track from different manufacturers voids the laboratory test basis for the assembly, because the rated STC and fire performance are properties of the complete tested assembly and not of any single component. {note}
### The specified laboratory STC rating shall be substantiated by an ASTM E90 / E413 test report on the actual panel assembly proposed, not on a similar or representative assembly. {note}
−### Fire-rated assemblies shall bear a listing label from a nationally recognized testing laboratory and shall be installed in strict conformance with the listed assembly. {note}
+### Fire-rated assemblies shall bear a listing label from a nationally recognized testing laboratory and shall be installed in strict conformance with the listed assembly.
### Mock-up {toc}
−### Where a mock-up is required, the Contractor shall install one full-height partition bay, including a panel-to-panel joint, the bottom seal, and the top closure, for review of operation, fit, and finish before proceeding. {note}
+### Where a mock-up is required, the Contractor shall install one full-height partition bay, including a panel-to-panel joint, the bottom seal, and the top closure, for review of operation, fit, and finish before proceeding.
−### The approved mock-up shall establish the standard of quality for the work and may remain as part of the finished work if undisturbed and undamaged. {note}
+### The approved mock-up shall establish the standard of quality for the work and may remain as part of the finished work if undisturbed and undamaged.
```datasheet
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### The specified STC is a laboratory rating measured under ideal conditions per ASTM E90 and classified per ASTM E413; it represents the performance ceiling of the panel assembly, not the performance that will be achieved in the field. {note}
−### The partition panels shall achieve the specified laboratory STC rating when tested as a complete assembly in accordance with ASTM E90 and rated in accordance with ASTM E413. {note}
+### The partition panels shall achieve the specified laboratory STC rating when tested as a complete assembly in accordance with ASTM E90 and rated in accordance with ASTM E413.
```datasheet
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step: 1
setpoints:
+ - 25
- 40
- 45
- 50
- 53
- 56
+ - 60
default: 50
```
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### Specifying a laboratory STC without also stating an acceptable field NIC sets up a performance guarantee that the partition alone cannot meet, because the field result depends on the ceiling, plenum, floor, and adjacent construction as much as on the panels. {note}
−### The drawings shall identify the rooms requiring rated sound isolation and the partition zones to which each STC rating applies. [[drawing: acoustic partition schedule]] {note}
+### The drawings shall identify the rooms requiring rated sound isolation and the partition zones to which each STC rating applies. [[drawing: acoustic partition schedule]]
−### Where field acoustic verification is specified, the installed partition shall achieve the specified field NIC or field STC when tested in accordance with ASTM E336. {note}
+### Where field acoustic verification is specified, the installed partition shall achieve the specified field NIC or field STC when tested in accordance with ASTM E336.
```datasheet
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step: 1
setpoints:
+ - 30
- 35
- 40
- 42
- 45
+ - 52
default: 40
```
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- A motorized vertical-fold system descends from a ceiling pocket and requires no floor track, achieving the highest acoustic ratings and operating without floor obstruction
−### The partition operation type shall be as specified. {note}
+### The partition operation type shall be as specified.
```datasheet
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```
−### Accordion systems shall not be specified where the required laboratory STC exceeds 40, because the continuous hinge lines of an accordion cannot be sealed to the standard required for higher ratings. {note}
+### Accordion systems shall not be specified where the required laboratory STC exceeds 40, because the continuous hinge lines of an accordion cannot be sealed to the standard required for higher ratings.
### Drive type {toc}
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- Electrically operated partitions use a motorized drive and are specified for large, heavy, or vertical-fold systems, or where operation by untrained staff must be simplified
−### The partition drive type shall be as specified. {note}
+### The partition drive type shall be as specified.
```datasheet
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```
−### Electrically operated partitions shall include an emergency stop and a means to detect and stop on obstruction during travel. {note}
+### Electrically operated partitions shall include an emergency stop and a means to detect and stop on obstruction during travel.
# Panel Construction {toc}
## Construction requirements {toc}
−### Panel construction determines the partition's weight, acoustic rating, and finish options; heavier and denser cores achieve higher STC but increase the load the supporting structure must carry. {note}
+### Panel construction determines the partition's weight, acoustic rating, and finish options; heavier and denser cores achieve higher STC but increase the load the supporting structure must carry.
−### Panels shall be of rigid construction that maintains flatness, alignment, and seal contact over the life of the partition. {note}
+### Panels shall be of rigid construction that maintains flatness, alignment, and seal contact over the life of the partition.
### Panel core {toc}
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- A steel-faced mineral-board or gypsum-core construction adds mass for higher STC ratings and is the typical core for fire-rated assemblies
−### The panel core construction shall be as specified to achieve the required acoustic and fire ratings. {note}
+### The panel core construction shall be as specified to achieve the required acoustic and fire ratings.
```datasheet
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### Panel width affects the number of panels, the joint count, and the stacking-pocket size; standard widths reduce cost and lead time relative to custom widths. {note}
−### Panel height shall extend from the finished floor to the underside of the support header so that the top and bottom closures can seal continuously. {note}
+### Panel height shall extend from the finished floor to the underside of the support header so that the top and bottom closures can seal continuously.
−### Panels shall be provided in the nominal width specified, with the final panel widths adjusted by the manufacturer to suit the measured opening. {note}
+### Panels shall be provided in the nominal width specified, with the final panel widths adjusted by the manufacturer to suit the measured opening.
```datasheet
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step: 1
setpoints:
+ - 24
- 36
- 42
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```
−### The opening height and width shall be field-measured and confirmed on the shop drawings before fabrication. [[drawing: partition opening dimensions]] {note}
+### The opening height and width shall be field-measured and confirmed on the shop drawings before fabrication. [[drawing: partition opening dimensions]]
### Panel face finish {toc}
−### The panel face finish establishes the appearance of the partition and shall meet the interior-finish flame-spread classification required for the occupancy. {note}
+### The panel face finish establishes the appearance of the partition and shall meet the interior-finish flame-spread classification required for the occupancy.
+```datasheet
+label: Required Finish Flame-Spread Classification
+type: radio
+options:
+ - Class A (FSI ≤ 25, SDI ≤ 450) per ASTM E84
+ - Class B (FSI 26-75, SDI ≤ 450) per ASTM E84
+ - NFPA 286 compliant (alternative to ASTM E84)
+default: Class A (FSI ≤ 25, SDI ≤ 450) per ASTM E84
+```
+
### The common face-finish options balance appearance, durability, and acoustic absorption: {note}
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- Writing-surface finishes provide a markerboard or tackable face where the partition doubles as a work surface
−### The panel face finish shall be as specified. {note}
+### The panel face finish shall be as specified.
```datasheet
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### The panel face finish shall meet the flame-spread classification required for the occupancy, demonstrated by an ASTM E84 test or, where the finish cannot achieve a Class A tunnel-test rating, by an NFPA 286 room-corner test. {note}
−```datasheet
−label: Required Finish Flame-Spread Classification
−type: radio
−options:
− - Class A (FSI ≤ 25, SDI ≤ 450) per ASTM E84
− - Class B (FSI 26-75, SDI ≤ 450) per ASTM E84
− - NFPA 286 compliant (alternative to ASTM E84)
−default: Class A (FSI ≤ 25, SDI ≤ 450) per ASTM E84
−```
−
### Substitution of a non-compliant finish by the Contractor or Owner is prohibited; many fabrics and veneers do not meet Class A, and a non-compliant finish in a regulated occupancy is a code violation discovered at inspection. {note}
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### The track carries the full weight of the partition and defines the path the panels travel between the opening and the storage pocket. {note}
−### The track shall be a continuous extruded aluminum or formed-steel section sized by the manufacturer for the panel weight and span. {note}
+### The track shall be a continuous extruded aluminum or formed-steel section sized by the manufacturer for the panel weight and span.
### Track path {toc}
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- Intersecting tracks with T- or Y-junctions allow a single partition system to divide a space in more than one direction
−### The track path and any intersections shall be as shown. [[drawing: track layout plan]] {note}
+### The track path and any intersections shall be as shown. [[drawing: track layout plan]]
```datasheet
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### Carriers and suspension {toc}
−### Each panel shall be supported from the track by trolley carriers running on the track's load surface. {note}
+### Each panel shall be supported from the track by trolley carriers running on the track's load surface.
−### Carrier wheels shall be of a material that runs quietly and resists flat-spotting under sustained panel load. {note}
+### Carrier wheels shall be of a material that runs quietly and resists flat-spotting under sustained panel load.
−### Suspension hardware shall allow vertical adjustment of each panel to set the bottom-seal clearance and align the panel tops. {note}
+### Suspension hardware shall allow vertical adjustment of each panel to set the bottom-seal clearance and align the panel tops.
# Supporting Structure {toc}
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### This limit is roughly L/2400 and is far more stringent than the L/360 or L/480 limits used for visual or serviceability criteria; standard framing designed only to those limits will nearly always fail the partition's requirement. {note}
−### The deflection limit shall be confirmed by the structural engineer of record and shown on the structural drawings. [[drawing: partition support beam and deflection note]] {note}
+### The deflection limit shall be confirmed by the structural engineer of record and shown on the structural drawings. [[drawing: partition support beam and deflection note]]
```datasheet
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step: 0.0625
setpoints:
+ - 0.0625
- 0.125
+ - 0.25
default: 0.125
```
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### In moderate to high seismic design categories, the track and stacking-pocket framing shall be positively braced to the structure in accordance with ASCE 7. {note}
−### Seismic bracing connections shall not bridge the acoustic barrier between the divided spaces, because a rigid connection across the barrier creates a structure-borne flanking path. {note}
+### Seismic bracing connections shall not bridge the acoustic barrier between the divided spaces, because a rigid connection across the barrier creates a structure-borne flanking path.
−### The applicable seismic design category shall be as specified. {note}
+### The applicable seismic design category shall be as specified.
```datasheet
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- A manual sweep seal is a fixed seal at the panel base suitable only for lower STC ratings and flat floors
−### The bottom-seal type shall be as specified to suit the required acoustic rating and the floor condition. {note}
+### The bottom-seal type shall be as specified to suit the required acoustic rating and the floor condition.
```datasheet
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```
−### Automatic drop seals shall provide vertical travel sufficient to close the gap over the floor's measured flatness variation. {note}
+### Automatic drop seals shall provide vertical travel sufficient to close the gap over the floor's measured flatness variation.
### Vertical edge seals {toc}
### Vertical seals between adjacent panels and at the fixed jamb, called astragals, close the joints that are the partition's principal flanking path. {note}
−### Vertical edge seals shall engage under compression so that the panel-to-panel and panel-to-jamb joints close fully when the partition is deployed. {note}
+### Vertical edge seals shall engage under compression so that the panel-to-panel and panel-to-jamb joints close fully when the partition is deployed.
−### The vertical edge seal material shall be as specified. {note}
+### The vertical edge seal material shall be as specified.
```datasheet
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### The top closure seals the joint between the panel tops and the support header and is the single largest flanking path when it is left open. {note}
−### The top closure shall provide continuous compressible contact between the panel tops and the header across the full length of the partition. {note}
+### The top closure shall provide continuous compressible contact between the panel tops and the header across the full length of the partition.
### The ceiling above and adjacent to the partition is critical to its acoustic performance. {note}
−### A hard ceiling of gypsum or equivalent construction directly above the partition is strongly preferred; an acoustic-tile ceiling is a poor acoustic boundary and shall be replaced with hard construction in the partition zone or fitted with a continuous compressible head closure. {note}
+### A hard ceiling of gypsum or equivalent construction directly above the partition is strongly preferred; an acoustic-tile ceiling is a poor acoustic boundary and shall be replaced with hard construction in the partition zone or fitted with a continuous compressible head closure.
```datasheet
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### Plenum flanking {toc}
−### The space above the partition and below the structure, the plenum, must be acoustically closed; sound that passes over the partition through the plenum bypasses the panel rating entirely. {note}
+### The space above the partition and below the structure, the plenum, must be acoustically closed; sound that passes over the partition through the plenum bypasses the panel rating entirely.
−### A continuous acoustic barrier shall be provided in the plenum above the partition, aligned with the panel plane and sealed to the structure and the partition header. {note}
+### A continuous acoustic barrier shall be provided in the plenum above the partition, aligned with the panel plane and sealed to the structure and the partition header.
### Ducts, return-air paths, structural members, conduit, and sprinkler branches that cross the plane of the partition shall be identified during design and rerouted or acoustically isolated, because each unaddressed penetration bypasses the partition's rating. {note}
−### Plenum penetrations within the plane of the partition shall be shown so they can be coordinated before construction. [[drawing: plenum penetrations at partition]] {note}
+### Plenum penetrations within the plane of the partition shall be shown so they can be coordinated before construction. [[drawing: plenum penetrations at partition]]
# Floor Conditions {toc}
## Floor flatness {toc}
−### The floor beneath the partition must be flat enough for the bottom seal to function; a poorly flat floor leaves gaps at low points while the seal bottoms out at high points. {note}
+### The floor beneath the partition must be flat enough for the bottom seal to function; a poorly flat floor leaves gaps at low points while the seal bottoms out at high points.
−### The finished floor beneath the partition shall meet the floor-flatness tolerance specified, measured in accordance with ASTM E1155. {note}
+### The finished floor beneath the partition shall meet the floor-flatness tolerance specified, measured in accordance with ASTM E1155.
```datasheet
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step: 5
setpoints:
+ - 20
- 25
- 35
+ - 50
default: 25
```
−### The floor-flatness requirement shall be coordinated with the concrete floor specification so the tolerance is achieved during placement rather than corrected afterward. {note}
+### The floor-flatness requirement shall be coordinated with the concrete floor specification so the tolerance is achieved during placement rather than corrected afterward.
−### Floors that fail the flatness tolerance shall be ground or filled within the partition path so the bottom seal maintains continuous contact. {note}
+### Floors that fail the flatness tolerance shall be ground or filled within the partition path so the bottom seal maintains continuous contact.
# Pass Doors {toc}
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### A pass door is a hinged door integrated into one or more panels to allow passage through the partition without opening it. {note}
−### Where a pass door is specified, it shall match the acoustic rating of the partition so that it does not become a flanking path. {note}
+### Where a pass door is specified, it shall match the acoustic rating of the partition so that it does not become a flanking path.
−### Where the partition is fire-rated, the pass door shall carry the same fire rating as the partition, because a non-rated door in a rated partition is a code violation. {note}
+### Where the partition is fire-rated, the pass door shall carry the same fire rating as the partition, because a non-rated door in a rated partition is a code violation.
### Pass-door hardware, including the closer, latch, and threshold, shall be selected to maintain the door's acoustic and fire ratings when closed. {note}
−### The number and location of pass doors shall be as shown. [[drawing: pass door locations]] {note}
+### The number and location of pass doors shall be as shown. [[drawing: pass door locations]]
```datasheet
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### Where a fire rating is specified, the partition shall be a complete assembly listed for the rating by a nationally recognized testing laboratory and tested in accordance with UL 10B or NFPA 252. {note}
−### The fire-resistance rating of the partition shall be as specified. {note}
+### The fire-resistance rating of the partition shall be as specified.
```datasheet
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```
−### A fire-rated assembly shall be installed exactly as described in the listing; substitution of any seal, hardware item, or finish not part of the listed assembly voids the rating. {note}
+### A fire-rated assembly shall be installed exactly as described in the listing; substitution of any seal, hardware item, or finish not part of the listed assembly voids the rating.
−### Not all manufacturers offer a 2-hour rating; specifying a 2-hour fire-rated operable partition narrows the field of available products and shall be confirmed against product availability before bidding. {note}
+### Not all manufacturers offer a 2-hour rating; specifying a 2-hour fire-rated operable partition narrows the field of available products and shall be confirmed against product availability before bidding.
# Storage and Stacking {toc}
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- Exposed-stack storage leaves the panels visible at one end of the opening and is the lowest-cost option where appearance permits
−### The storage method shall be as specified. {note}
+### The storage method shall be as specified.
```datasheet
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```
−### The stacking pocket shall be sized to accommodate the full folded panel stack plus the clearance required for the panels to enter and exit. {note}
+### The stacking pocket shall be sized to accommodate the full folded panel stack plus the clearance required for the panels to enter and exit.
### Stacking pockets are routinely undersized on plans; the pocket width, depth, and height shall be confirmed against the stored stack dimensions on the shop drawings before the surrounding construction proceeds. {note}
−### The stacking-pocket location and dimensions shall be as shown. [[drawing: stacking pocket plan]] {note}
+### The stacking-pocket location and dimensions shall be as shown. [[drawing: stacking pocket plan]]
# Installation {toc}
## Installation requirements {toc}
−### The partition shall be installed by the manufacturer's trained or certified installer in accordance with the approved shop drawings and the manufacturer's instructions. {note}
+### The partition shall be installed by the manufacturer's trained or certified installer in accordance with the approved shop drawings and the manufacturer's instructions.
### Sequencing {toc}
−### The supporting structure shall be complete and its deflection limit verified before the track is installed, because the track cannot be aligned to a structure that has not yet been confirmed. {note}
+### The supporting structure shall be complete and its deflection limit verified before the track is installed, because the track cannot be aligned to a structure that has not yet been confirmed.
−### The track shall be installed level and aligned to the path shown before panels are hung. {note}
+### The track shall be installed level and aligned to the path shown before panels are hung.
−### The finished floor beneath the partition shall be complete and verified for flatness before the bottom seals are adjusted. {note}
+### The finished floor beneath the partition shall be complete and verified for flatness before the bottom seals are adjusted.
### Adjustment {toc}
−### Each panel shall be adjusted at its suspension hardware to align the panel tops and set the bottom-seal clearance. {note}
+### Each panel shall be adjusted at its suspension hardware to align the panel tops and set the bottom-seal clearance.
−### Seals shall be adjusted so that, with the partition deployed, the bottom, vertical, and top closures all engage fully and continuously. {note}
+### Seals shall be adjusted so that, with the partition deployed, the bottom, vertical, and top closures all engage fully and continuously.
### The installed partition shall operate smoothly through its full travel without binding, and shall stack and deploy without forcing. {note}
### Protection {toc}
−### Installed panels and finishes shall be protected from damage by other trades until final acceptance. {note}
+### Installed panels and finishes shall be protected from damage by other trades until final acceptance.
# Field Quality Control {toc}
## Demonstration and field test {toc}
−### The installer shall demonstrate full operation of the partition, including deployment, stacking, and seal engagement, to the Owner before acceptance. {note}
+### The installer shall demonstrate full operation of the partition, including deployment, stacking, and seal engagement, to the Owner before acceptance.
### Where field acoustic verification is specified, the test shall be conducted under ASTM E336 after the plenum barrier, ceiling, and floor are complete, because an early test measures an incomplete assembly. {note}
−### Deficiencies identified by demonstration or field test shall be corrected and the affected portion re-verified. {note}
+### Deficiencies identified by demonstration or field test shall be corrected and the affected portion re-verified.
# Delivery, Storage, and Handling {toc}
## Panel delivery and storage {toc}
−### Panels shall be delivered in the manufacturer's protective packaging and shall not be delivered until the storage area is enclosed and conditioned. {note}
+### Panels shall be delivered in the manufacturer's protective packaging and shall not be delivered until the storage area is enclosed and conditioned.
−### Panels shall be stored flat or upright as directed by the manufacturer, off the floor, and protected from moisture and physical damage. {note}
+### Panels shall be stored flat or upright as directed by the manufacturer, off the floor, and protected from moisture and physical damage.
−### Finished panel faces shall be protected from soiling, abrasion, and impact during storage and handling. {note}
+### Finished panel faces shall be protected from soiling, abrasion, and impact during storage and handling.
# Warranty {toc}
## Warranty coverage {toc}
−### The manufacturer shall warrant the partition against defects in materials and workmanship for the period specified, beginning at Substantial Completion. {note}
+### The manufacturer shall warrant the partition against defects in materials and workmanship for the period specified, beginning at Substantial Completion.
−### The warranty period for the partition system shall be as specified. {note}
+### The warranty period for the partition system shall be as specified.
```datasheet
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```
−### Electric drive components, where provided, shall be warranted for the period specified. {note}
+### Electric drive components, where provided, shall be warranted for the period specified.
```datasheet
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## Spare parts provision {toc}
−### The Contractor shall furnish the spare seals and hardware specified so that routine wear items can be replaced without a long procurement lead time. {note}
+### The Contractor shall furnish the spare seals and hardware specified so that routine wear items can be replaced without a long procurement lead time.
−### Spare parts shall be furnished as specified. {note}
+### Spare parts shall be furnished as specified.
```datasheet
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```
−### Spare seals shall match the seals installed in the partition so that a replacement maintains the tested acoustic performance. {note}
+### Spare seals shall match the seals installed in the partition so that a replacement maintains the tested acoustic performance.