PAC International RSIC-CWB HD/DD DC
The RSIC-CWB HD/DD DC is a 72 lb resilient brace for connecting adjacent wood- or steel-framed walls — or a secondary dropped-ceiling frame — to supporting framing without creating a rigid vibration bridge. Each steel end fastens to a different framing member; the central resilient connection provides heavy-duty, double-deflection isolation, while the DC version carries PAC's deflection-control designation. It is selected when two otherwise-separated framing systems need bracing — not simply because a wall is being soundproofed. It does not accept hat channel and does not carry drywall.
- Framing to framing, not drywall to framing: One steel wing screws to the first wall's framing, the other to the adjacent wall's framing, and the resilient element in between keeps the two leaves from becoming a rigid pair. Gypsum stays on its own studs or on a separately specified isolation system.
- 72 lb acoustical design load: PAC publishes a 72 lb per-isolator acoustical design load for both RSIC-CWB HD/DD and HD/DD DC. The standard RSIC-CWB is rated 36 lb.
- HD / DD / DC decoded: HD is Heavy Duty, DD is Double Deflection, DC is Deflection Control. PAC lists total deflection of 3 mm with double deflection of 1.5 mm; movement criteria for a specific condition should be confirmed with PAC or your design professional.
- Adjustable across the cavity: PAC lists the isolator as adjustable with a 2 in adjustment limit, over a listed cavity range of about 2 in minimum to 4 in maximum.
- Shipped assembled and calibrated: The brace arrives fully assembled and calibrated; installation is fastening each end to its framing member with the approved screws.
Online orders up to 4,999 pieces. For anything larger, call (415) 864-4440 and we'll price the project with you.
Volume pricing
$18.95 per clip. Order 250+ clips and pay $18.65 per clip — an extra $0.30 off per clip for each additional 250 clips, down to a $15.25 per clip floor.
Discounts apply automatically in the cart and count boxes and cases toward the total.
RSIC-CWB HD/DD DC Specifications
- Product type
- Resilient cross-wall / chase-wall brace (framing to framing)
- Acoustical design load
- 72 lb per isolator
- Total deflection
- 3 mm (PAC submittal)
- Double deflection
- Yes — 1.5 mm (PAC submittal)
- Adjustable
- Yes — 2 in adjustment limit
- Cavity range
- 2 in minimum to 4 in maximum
- Framing
- Wood or steel
- Steel framing minimum
- 25 Ga. (0.030 in) as stated by PAC — this gauge/thickness pairing is unusual in common gauge nomenclature, so verify the current PAC and project steel thickness requirement
- Maximum spacing — vertical
- 48 in o.c.
- Maximum spacing — horizontal
- 24 in o.c.
- End rows
- First and last rows within 8 in of floor and ceiling
- Fasteners — wood
- 1 1/4 in minimum coarse-thread screw
- Fasteners — steel
- #7 × 1/2 in minimum fine-thread screw
- Screws per connection point
- Minimum 2 (both ends attached: at least 4 per brace)
- Nails
- Not permitted — approved screws only
- Supplied condition
- Shipped fully assembled and calibrated
- Accepts hat / furring channel
- No — it braces framing members, it does not carry drywall
Clip attachment
- 1 — First wall framing
- One perforated steel wing screws flat to a stud or framing member in the first wall
- 2 — Deflection-control isolator
- The central resilient element spans the cavity and keeps the two framing systems separated
- 3 — Second wall framing
- The opposite wing screws to a framing member in the adjacent wall or secondary framed structure
- Fasteners
- Minimum 2 approved screws at each end — at least 4 per brace; nails are not permitted
- Layout
- Maximum 24 in horizontal × 48 in vertical, with the first and last rows within 8 in of floor and ceiling
- Gypsum
- Board stays on its own framing — the brace never receives hat/furring channel or carries drywall
RSIC-CWB HD/DD DC Preliminary Estimate
This bracket braces one framing member to another, so the count comes off the bracing grid between opposing framing — not off drywall area. On walls PAC allows brace columns no farther than 24 in apart, rows no farther than 48 in apart, and the first and last rows within 8 in of floor and ceiling. This is a preliminary material takeoff only: the design professional decides whether resilient cross-bracing is required at all and whether the brace loads are acceptable.
Brace positions have to align with framing members that actually face each other across the cavity, so plot them on the framing plan before ordering. Exact framing and end locations can change the count. Brackets are fastened, not cut — there is no waste factor, only the optional ordering allowance above.
How RSIC-CWB HD/DD DC compares
| Model | What It Connects | Acoustical Design Load | Isolation | Notes |
|---|---|---|---|---|
| RSIC-CWB HD/DD DCthis | Framing member to framing member | 72 lb per isolator | Heavy-duty, double deflection with deflection-control designation | Chase / cross-wall brace; does not accept furring channel |
| RSIC-CWB HD/DD | Framing member to framing member | 72 lb per isolator | Heavy duty, double deflection | Same family without the DC designation |
| RSIC-CWB (standard) | Framing member to framing member | 36 lb per isolator | Resilient isolator | Baseline brace for lighter chase / secondary framing conditions |
| RSIC-1 / Resilmount A237R | Framing to furring channel and drywall | Per each product's published clip rating | Rubber / elastomer clip isolator | Different job entirely: these support furring channel and gypsum, while the CWB braces one framing system to another |
