Curtain-Wall Connector Standoff Distances
| Model No. | Fastener Pattern | Depth of Stud | ||||
|---|---|---|---|---|---|---|
| 3 5/8" | 6" | 8" | 10" | 12" | ||
| SCB43.5 | A | 0" to 1" | 0" to 1" | 0" to 1" | 0" to 1" | 0" to 1" |
| SCB45.5/MSCB45.5 | B | 1 7/8" to 2 3/4" | 0" to 2 3/4" | 0" to 2 3/4" | 0" to 2 3/4" | 0" to 2 3/4" |
| C, D and E | — | 0" to 1 1/2" | 0" to 1 1/2" | 0" to 1 1/2" | 0" to 1 1/2" | SCB47.5/MSCB47.5 | B | 3 7/8" to 4 3/4" | 1 1/2" to 4 3/4" | 0" to 4 3/4" | 0" to 4 3/4" | 0" to 4 3/4" |
| C, D and E | — | 1 1/2" to 3 1/2" | 0" to 3 1/2" | 0" to 3 1/2" | 0" to 3 1/2" | |
| SCB49.5 | B | 5 7/8" to 6 3/4" | 3 1/2" to 6 3/4" | 1 1/2" to 6 3/4" | 0" to 6 3/4" | 0" to 6 3/4" |
| C, D and E | — | 3 1/2" to 5 1/2" | 1 1/2" to 5 1/2" | 0" to 5 1/2" | 0" to 5 1/2" | |
| SCB411.5 | B | 7 7/8" to 8 3/4" | 5 1/2" to 8 3/4" | 3 1/2" to 8 3/4" | 1 1/2" to 8 3/4" | 0" to 8 3/4" |
| C, D and E | — | 5 1/2" to 7 1/2" | 3 1/2" to 7 1/2" | 1 1/2" to 7 1/2" | 0" to 7 1/2" | |
| SSB3.518/FSB3.518 | B2 | 0" to 12 1/4" | 0" to 12 1/4" | 0" to 12 1/4" | 0" to 12 1/4" | 0" to 12 1/4" |
| C, D and E3 | — | 0" to 11" | 0" to 11" | 0" to 11" | 0" to 11" | |
| FCB43.5 | Min.4 | 0" to 1" | 0" to 1" | 0" to 1" | 0" to 1" | 0" to 1" |
| Max.4 | 0" to 1" | 0" to 1" | 0" to 1" | 0" to 1" | 0" to 1" | |
| FCB45.5 | Min.4 | — | 0" to 1 1/2" | 0" to 1 1/2" | 0" to 1 1/2" | 0" to 1 1/2" |
| Max.4 | — | 0" to 1 1/2" | 0" to 1 1/2" | 0" to 1 1/2" | 0" to 1 1/2" | |
| FCB47.5 | Min.4 | — | 1 1/2" to 3 1/2" | 0" to 3 1/2" | 0" to 3 1/2" | 0" to 3 1/2" |
| Max.4 | — | — | 0" to 1" | 0" to 1" | 0" to 1" | |
| FCB49.5 | Min.4 | — | 3 1/2" to 5 1/2" | 1 1/2" to 5 1/2" | 0" to 5 1/2" | 0" to 5 1/2" |
| Max.4 | — | — | — | 0" to 1" | 0" to 1" | |
| FCB411.5 | Min.4 | — | 5 1/2" to 7 1/2" | 3 1/2" to 7 1/2" | 1 1/2" to 7 1/2" | 0" to 7 1/2" |
| Max.4 | — | — | — | — | 0" to 1" | |
- The stand-off is the distance from the interior flange of the stud to the face of the supporting structure (see illustration below).
All dimensions assume fasteners are installed a minimum of 1/2" from the edge of stud, and the connector does not extend
beyond the exterior flange of the stud; “—” designates conditions where fastener pattern will not fit on stud. - A tabulated maximum stand-off of 12 1/4" is based on three anchors. For two anchors, maximum stand-off is 13 1/4".
- A tabulated maximum stand-off of 11" is based on three anchors. For two anchors, maximum stand-off is 12".
- For FCB fixed connectors (pp. 47–49), minimum indicates fill all round holes, and maximum indicates fill all round and triangle holes.
- Fastener patterns are as follows:
Stand-Off Distance
Pattern A
Two screws installed with one in each slot
Two screws installed with one in each slot
Pattern B
Two screws installed in slots farthest from the anchor leg
Two screws installed in slots farthest from the anchor leg
Pattern C
Two screws installed in slots closest to the anchor leg
Two screws installed in slots closest to the anchor leg
Pattern D
Two screws installed in outer slots with center slot empty
Two screws installed in outer slots with center slot empty
Pattern E
Three screws
Three screws