PAC International RSIC-1 Edge
The RSIC-1 Edge is used together with standard RSIC-1 clips, at the few positions where an RSIC-1 cannot be installed because there is no suitable framing face — the end of a furring-channel run, a channel running parallel to the framing at a wall/ceiling intersection, or a ceiling perimeter with no joist above. Its down-facing metal L bracket fastens tight to whatever structure is available, and its rubber isolator carries the furring channel in the same horizontal plane as the surrounding RSIC-1 clips. It is not installed continuously around every perimeter and it does not replace the RSIC-1 in the field.
- Used with the RSIC-1, not instead of it: PAC's own guide calls it a clip 'for use in conjunction with the RSIC-1' where the standard clip cannot be installed due to a lack of mounting surface. The field quantity stays RSIC-1.
- An exception count, never an area count: Mark the channel-run ends and positions with no framing face, and order one Edge per position. Five wall channel rows needing support at one end is five Edge clips.
- Down-facing L bracket keeps the plane: The bracket mounts tight to the available structure or the wall top plate so the Edge channel grip sits in the same horizontal plane as the RSIC-1 clips on the joists.
- Walls and ceilings: PAC lists use on walls: yes and use on ceilings: yes, in wood, steel, CMU or concrete systems that already use RSIC-1 clips.
- 18 lb per isolator: Maximum acoustical design load is 18 lb. Check the tributary load of the furring, gypsum layers and finishes at each Edge position — no cabinets, bookshelves or unrelated loads.
- Fixed 1-5/8 in cavity: The specification table lists Adjustable: No, cavity minimum and maximum both 1-5/8 in, so the Edge lines up with the RSIC-1 it works alongside. It is not field height-adjustable.
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RSIC-1 EDGE Specifications
- Purpose
- Exception / support clip used with RSIC-1 clips where no suitable framing face exists for a standard RSIC-1
- Use on walls
- Yes
- Use on ceilings
- Yes
- Upper connection
- Down-facing metal L bracket fastened tight to the available framing, structure or wall top plate
- Isolation
- Rubber isolator · double deflection yes (1.5 mm) · total deflection 3 mm
- Lower connection
- Compatible 7/8 in, 25 ga hemmed-edge drywall furring channel, snapped in perpendicular or parallel to the framing per the approved detail
- Acoustical design load
- 18 lb maximum per isolator
- Support schedule
- 24 x 48 in o.c. with one layer of 5/8 in gypsum · 24 x 24 in o.c. with two layers · more isolators for heavier systems
- Spacing note
- The installation guide states maximum 48 in o.c. perpendicular to the joist/truss; a separate submittal spec line reads maximum 24 in o.c. These are the two axes of the same grid — project drawings and the RSIC-1 layout control
- Adjustable
- No — fixed cavity, not field height-adjustable
- Cavity
- 1-5/8 in minimum and maximum, aligning with the RSIC-1
- Dimensions (installation guide)
- Approximately 3 in wide x 5-1/2 in long x 1-1/2 in deep — the submittal drawing carries other partial dimensions; verify against the current detail
- Temperature
- Interior use only, 40–100 °F (4.4–37.8 °C)
- Furring channel splices
- Minimum 6 in overlap at mid span between clips — never on a clip — with two 7/16 in framing screws or double-wrapped 18 ga tie wire
- Perimeter
- Leave a 1/4 in gap around the perimeter for acoustical sealant; fire-rated sealant and UL detail where required
Compatible furring channel
- Gauge
- Recommended 25 gauge — hemmed edge required on all 25 ga furring channel; meets or exceeds SSMA minimums
- Depth
- 7/8 in
- Width — top
- 1-1/4 in
- Width — bottom
- 2-9/16 to 2-11/16 in minimum per the installation guide
- Alignment
- Edge channel grip is kept in the same horizontal plane as the RSIC-1 clips on the framing
RSIC-1 Edge preliminary count
The Edge is only used where a standard RSIC-1 has no framing face to mount to — the end of a furring-channel run, a channel running parallel to the framing at a wall/ceiling intersection, or a ceiling perimeter with no joist. Count those positions; every other support point on the same runs stays a standard RSIC-1. Wall or ceiling area never sets this number.
Five horizontal furring-channel rows on a wall, each with one end where no stud face is available: five RSIC-1 Edge clips. If both ends of every row are unsupported it is ten. On a ceiling, count the actual channel ends and perimeter positions with no joist — normally one Edge per affected run end.
Support schedule from the submittal: 24 x 48 in o.c. for one layer of 5/8 in gypsum and 24 x 24 in o.c. for two layers, with more isolators for heavier systems. The installation guide adds a maximum 48 in o.c. perpendicular to the joist or truss, and a separate submittal spec line reads maximum 24 in o.c. Those are the two axes of the same grid — the project drawings and the RSIC-1 layout control which applies where.
How RSIC-1 EDGE compares
| Model | Role | Mounts to | Quantity method | Design load |
|---|---|---|---|---|
| RSIC-1 EDGEthis | Exception / support clip where no standard mounting face exists | Down-facing L bracket on available structure or wall top plate | Count of unsupported channel ends and exception positions | 18 lb per isolator |
| RSIC-1 | Normal field clip for the whole wall or ceiling | Directly to a suitable framing member | The field layout grid from the RSIC-1 guide | Per the RSIC-1 installation guide |
| RSIC-1 Backer | Backing/support accessory used with RSIC-1 clips | Per its own installation guide | Per its own installation guide | Per its own installation guide |
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