Does furring or hat channel snap into this connector?

No. The RSIC-DC04X2 has no channel-receiving geometry. RSIC-1 is the PAC product that accepts 7/8 in furring channel and supports gypsum. The two products do different jobs and are often specified in the same room.

How many connectors does a wall need?

PAC's current submittal says to locate connectors a maximum of 48 in apart on each vertical stud when isolating framing. Count the secondary studs that actually receive connectors, add enough rows so spacing along every stud stays within 48 in, then multiply by the number of wall sections. At maximum spacing that works out to roughly 5.33 sq ft per connector on 16 in studs and 8 sq ft on 24 in studs — but that area figure is only a sanity check.

Can one connector hold a 72 lb light, fan or projector?

Not automatically. 72 lb is the maximum dead or shear acoustical design load per connector, not a blanket structural approval for a device. Equipment applications need their own attachment and load design, adequate supporting structure, safety factors, vibration requirements, and code or seismic review. Split the load across the actual load path and add connectors for focused loads.

How is the blade sealed where it passes through gypsum?

Seal every penetration and potential air leak with flexible non-hardening acoustical sealant, and use fire-rated acoustical sealant wherever the blade penetrates gypsum board or a fire-rated assembly is required. Putty-pad electrical boxes in isolated walls and ceilings.

PAC International Clips

PAC International RSIC-DC04X2

The RSIC-DC04X2 is a 72 lb double-isolator connector used to resiliently attach secondary wall framing, suspended ceiling framing or selected mechanical/equipment supports to the primary structure. The two isolated mounting ferrules attach to the structure, while the projecting steel blade provides the decoupled connection point. It is used on walls and ceilings in new construction or retrofit; it is not an RSIC-1-style hat-channel clip, and drywall never fastens through its rubber isolators.

PAC International RSIC-DC04X2 double-isolator sound isolation connector — front view showing the tall vertical steel blade above two rubber isolators. — The tall steel blade stands above two rubber isolators seated on a perforated base — the blade is the decoupled connection point, and the two isolators bolt down to the structure.

Two isolated mounting points: Two structural fasteners pass through the connector's internal metal ferrules into wood, steel, concrete or CMU. The ferrules must seat firmly against the structure.
Projecting steel blade: The vertical blade — minimum 4-1/2 in projection from the supporting structure per PAC's current submittal — carries the isolated connection: secondary framing, minimum 12 ga hanger wire through the existing 1/4 in hole, or a specifically designed equipment attachment.
72 lb acoustical design load: Maximum dead or shear acoustical design load of 72 lb per connector, with 3 mm total listed deflection and double deflection per PAC's submittal. The separate RSIC-DC04X2 HD is the 144 lb version.
Walls and ceilings, new or retrofit: PAC lists use on walls and ceilings, in new construction and retrofit. Layout differs by application: connectors no more than 48 in apart on each vertical stud for framing, or a maximum 48 in × 48 in grid for ceilings.

$14.59

/ clip

TypeQuantity

Online orders up to 4,999 pieces. For anything larger, call (415) 864-4440 and we'll price the project with you.

Volume pricing

$14.59 per clip. Order 250+ clips and pay $14.34 per clip — an extra $0.25 off per clip for each additional 250 clips, down to a $12.29 per clip floor.

Discounts apply automatically in the cart and count boxes and cases toward the total.

Authorized PAC International DealerStandard 72 lb X2 — HD version sold separatelyLocal pickup: SF, San Leandro, LA

Product Specs

RSIC-DC04X2 Specifications

PAC International RSIC-DC04X2 dimensional drawing — front and side elevations showing the 4-1/2 in overall height, 1-1/2 in blade width with slotted and round fastening holes, the two rubber isolators, and the 3-1/2 in span across both isolator bases.

Product type: Double-isolator decoupling connector (not a drywall or hat-channel clip)
Acoustical design load: 72 lb dead or shear, per connector
Total deflection: 3 mm · double deflection (PAC submittal)
Blade projection: 4-1/2 in minimum from supporting structure to end of blade
Cavity: Minimum 4-1/2 in · maximum and adjustment listed as variable
Overall height: 4-1/2 in
Blade / face width: 1-1/2 in on the submittal drawing (install guide lists 1-3/4 in overall width)
Base span across both isolators: 3-1/2 in
Structure attachment: Two fasteners through the two internal ferrules
Max layout — walls: Connectors no more than 48 in apart on each vertical stud
Max layout — ceilings: 48 in × 48 in on center
Minimum steel framing: 20 ga (0.030 in)
Use on walls / ceilings: Yes / Yes · new construction and retrofit

Companion Component

Attachment fasteners

Wood framing: Two #10 × 2-1/2 in minimum, Type W coarse thread
Steel framing: Two #10 × 1-5/8 in minimum, Type S fine thread
Concrete / CMU: Two anchors, 2 in minimum length, #10 minimum shank or greater
Anchor length: Required embedment plus 1 in for the internal ferrule
Per-fastener capacity: Minimum 36 lb allowable pullout and shear (standard X2)
Nails: Never — approved screws or anchors only

Connector Estimator

RSIC-DC04X2 Preliminary Estimate

Gypsum does not fasten through this connector, so the count never comes off drywall area. On walls, PAC allows connectors no farther than 48 in apart on each vertical stud when isolating framing. On ceilings, the connector grid is a maximum of 48 in × 48 in on center. Pick the connection you are estimating.

Wall length (ft)Wall height (ft)Secondary-stud spacingWall sectionsSpare allowance (%)

Connectors are counted on the secondary studs that actually receive them, with enough rows that spacing along every stud stays within 48 in. First and last positions and any end restraint follow the wall and framing design. Connectors are fastened, not cut — the percentage above is an optional jobsite spare allowance, not cut waste.

Preliminary Material Estimate

Connectors (with spares)51

Layout before spares48 connectors

Secondary studs per section16

Connectors per stud3 · about 36 in apart

Structure fasteners (2 per connector)102

Sanity check — area ÷ 5.33 sq ft180 sq ft → 34

Preliminary material estimate — not a final structural, seismic, equipment-support or acoustical design. Each connector is limited to a 72 lb dead or shear acoustical design load, and quantity has to satisfy the predicted connection forces as well as the spacing maximums. PAC's guide specification requires the contractor to submit the proposed layout to the manufacturer and the architect.

Product Comparison

How RSIC-DC04X2 compares

Model	Isolators	Acoustical Design Load	What Attaches To It	Maximum Layout
RSIC-DC04X2this	Two	72 lb per connector	Secondary framing, 12 ga hanger wire / drywall grid, designed equipment support	48 in along each vertical stud · 48 in × 48 in ceiling grid
RSIC-DC04	One	36 lb per connector	Secondary framing or suspended components, per its own guide	Per the RSIC-DC04 installation guide
RSIC-DC04X2 HD	Two — heavy duty	144 lb per connector (2024 guide specification)	Same connections, heavier loads	48 in × 48 in ceiling grid · 48 in along each vertical stud
RSIC-1	One molded rubber isolator	Per its own guide	7/8 in furring channel, which then carries gypsum	Per the RSIC-1 installation guide

Downloads

Data Sheets & Guides

PAC Clips — Data Sheets Library

Full datasheet archive

FAQ

RSIC-DC04X2 — Common Questions

No. Two structural fasteners pass through the connector's internal ferrules into the primary structure, and the projecting steel blade takes the isolated connection — secondary framing, hanger wire for a drywall grid, or a specifically designed equipment support. Gypsum is then installed on that secondary framing or on a separately specified ceiling/wall system.