ClarkDietrich · Deflection Connections
Fast Strut™ (FS12, FS15, FS18, FS20, FS22, FS24)
Quote requiredVertical movement up to 2-1/2" (1-1/4" up and 1-1/4" down).
Fast Strut™ products are available in standard lengths of 12-1/4" and 15-1/4" and custom lengths of up to 24" long to allow framing attachment well beyond the perimeter of the structural steel or when the spandrel beams are set back from the edge of the structure. Struts are attached to the underside of structural members with screws, welds, or powder-actuated fasteners. Proprietary Deflection Screws are provided with each strut to ensure friction-free sliding. FS12 and FS15 are embossed with fastening patterns to ensure accurate placement of the fasteners.
- Material
- Structural Grade 50 Type H (ST50H), 50ksi
- Coating
- G90 (Z275) hot-dipped galvanized coating
- Gauge
- 14
- Mils
- 68
- Design thickness (in)
- 0.0713
- Packaging
- 10 pieces per carton
Description, photography, tables and documents as published by ClarkDietrich. Their product page ↗
Product Data & Ordering Information
6 codes. Every figure is ClarkDietrich's published data.| Product code | Size (in) | Submittal | |
|---|---|---|---|
| FS12 | 4 x 1-1/2 x 12-1/4 | PDF ↗ | |
| FS15 | 4 x 1-1/2 x 15-1/4 | PDF ↗ | |
| FS18 | 4 x 1-1/2 x 18 | PDF ↗ | |
| FS20 | 4 x 1-1/2 x 20 | PDF ↗ | |
| FS22 | 4 x 1-1/2 x 22 | PDF ↗ | |
| FS24 | 4 x 1-1/2 x 24 | PDF ↗ |
Codes are what ClarkDietrich publishes as available, not a promise of local stock — tell the desk the connection you have and we'll confirm what's on a shelf. A code with no sheet of its own can be generated from ClarkDietrich SubmittalPro ↗.
Product Highlights
- Vertical movement up to 2-1/2" (1-1/4" up and 1-1/4" down).
- Allows for standoff from the primary frame.
- Proprietary Deflection Screws (included) provide frictionless slip connection.
- Includes 55 Proprietary Deflection Screws per box
- See submittals for product weights
Installation
InstallationConnections to the building can be made with screws, powder-actuated fasteners, drill-in concrete anchors or welding. Mechanical fasteners shall be equally spaced along the scored line of the 1-1/2" flange. The strut must engage the building structure a minimum of 4". When using tabulated allowable loads, connections to the building structure must be made according to the table notes. Two or three Proprietary Deflection screws are used to attach the strut to the cold-formed steel framing. Screws shall be driven through the slotted holes and positioned to allow for the appropriate building deflection.Proprietary Deflection ScrewsMany of the ClarkDietrich deflection clips include our Proprietary Deflection Screws that has been specifically designed to provide friction-free deflection. These fasteners eliminate drag, binding or resistance that can often occur with common fasteners.
ClarkDietrich Suggests Instead
Connectors they list as alternatives for this connection.
- EXTENDED Fast Clip™
- FastClip™ Slide Clip (FCSC)
- Flat Tail™ Slide Clip
Documents
Served straight from ClarkDietrich so you always get the current revision. Each code's own submittal sheet is on its row in the table above.
- BIMBIM / Revit
- SustainabilityPROSustainability
- Fast Strut™ Catalog PageCatalog page
- IAPMO ER-0729Document
- AISI S100-16 (2020) w/S2-20Code report
- SDS For ASTM A1003 Steel Framing ProductsSafety data sheet
- AIA / CEUDocument
- CAD Details LibraryCAD detail
- Clip Express Product CatalogCatalog page
- Architectural SpecsSpecification
- CAD DetailsCAD detail
CAD Details
5 details for this connection, each published as a PDF to read and a DWG and DXF to draw with.
Ask About This Product
Answered from ClarkDietrich's own documents — the 3 sheets listed above — with the source and page behind every line.