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FCB/MFCB Bypass Framing Fixed-Clip Connectors

FCB/MFCB

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Roof Truss and Rafter Connectors, Ties, and Straps

This product's information may differ depending on the category of use. You are currently viewing details related to Roof Truss and Rafter Connectors, Ties, and Straps. You can also view product information related to the category: Rigid Connectors for Cold-Formed Steel Construction

The FCB/MFCB clips are economical, high-performance fixed-clip connectors that can be used for a variety of framing applications. The FCB/MFCB are rated for tension, compression, shear and in-plane loads and offer the designer the flexibility of specifying different screw and anchorage patterns that conform to desired load levels.

Key Features

  • Rated for tension, compression, shear and in-plane loads
  • Provides design flexibility with varying screw and anchorage patterns that achieve different load levels
  • Strategically placed stiffeners, embossments and anchor holes maximize connector performance

Material

  • FCB — 54 mil (16 ga.); MFCB — 68 mil (14 ga.)

Finish

  • Galvanized (G90)

Installation

  • Use the specified type and number of anchors.
  • Use the specified number of #12 self-drilling screws to CFS framing. Note if #10 self-drilling screws are preferred, reference DoD-Compliant Blast Design

Ordering Information

FCB43.5-R25, FCB45.5-R25, FCB47.5-R25, FCB49.5-R25, FCB411.5-R25, MFCB43.5-R25, MFCB45.5-R25 and MFCB47.5-R25 contain:

  • Box of 25 connectors (screws not included)

Related Literature

Connectors for Cold-Formed Steel Construction Catalog
C-CF-2020
A catalog for Connectors for Cold-Formed Steel Construction products and solutions.
Catalog
Bypass Framing Fixed-Clip Connector for Wood Framing
L-CF-FIXCLIPW22
This letter provides allowable loads and installation details of FCB connectors for use with wood framing.
Engineering Letter
Simpson Strong-Tie® MFCB Bypass Framing Fixed-Clip Connector
L-CF-MFCB21
The new MFCB bypass framing fixed-clip connector is part of the FCB bypass framing fixed-clip connector product line.
Engineering Letter

Product Information Table

Fastener Production Information and Stuff & Things
New products
Model No. Thickness (mil) Ga. L (in.) Product Includes Coating/Material Packaging Qty.
FCB411.5-R25 54 16 11 1/2 Box of 25 connectors (screws not included) Zinc Galvanized, G90 25
FCB43.5-R25 54 16 3 1/2 Box of 25 connectors (screws not included) Zinc Galvanized, G90 25
FCB45.5-R25 54 16 5 1/2 Box of 25 connectors (screws not included) Zinc Galvanized, G90 25
FCB47.5-R25 54 16 7 1/2 Box of 25 connectors (screws not included) Zinc Galvanized, G90 25
FCB49.5-R25 54 16 9 1/2 Box of 25 connectors (screws not included) Zinc Galvanized, G90 25
MFCB43.5-R25 68 14 3 1/2 Box of 25 connectors (screws not included) Zinc Galvanized, G90 25
MFCB45.5-R25 68 14 5 1/2 Box of 25 connectors (screws not included) Zinc Galvanized, G90 25
MFCB47.5-R25 68 14 7 1/2 Box of 25 connectors (screws not included) Zinc Galvanized, G90 25

Load Tables

FCB & MFCB Allowable Connector Loads (lb.)

Model No. Connector Material Thickness mil (ga.) L (in.) Min./Max. No. of #12-14 Self-Drilling Screws Stud Thickness
33 mil (20 ga.) 43 mil (18 ga.) 54 mil (16 ga.)
F1 F2 F3 F4 F1 F2 F3 F4 F1 F2 F3 F4
  1. Min. fastener quantity and load values — fill all round holes; max. fastener quantity and load values — fill all round and triangular holes.
  2. Allowable loads are based on clip capacity only and do not consider anchorage. The capacity of the connection system will be the minimum of the tabulated value and the allowable load from the FCB & MFCB Allowable Anchorage Loads tables below.
  3. Anchorage to the supporting structure using welds or a minimum of (2) #12—24 self-drilling screws is required.
  4. Tabulated F1 loads are based on assembly tests with the load through the centerline of stud. Tested failure modes were due to screw pullout; therefore compare F1 against Fp calculated per ASCE 7-10 Chapter 13 with ap = 1.25 and Rp = 1.0.
  5. Tabulated values for 54 mil (16 ga.) CFS framing may be used for 68 mil (14 ga.) and greater steel thickness.
  6. For additional important information, see General Information and Notes for Curtain-Wall Framing Connectors.
FCB43.5 54 (16) 3 1/2 Min. 4 135 755 755 755 205 1,105 975 1,120 345 1,250 975 1,490
Max. 6 205 1,100 1,130 1,130 265 1,105 1,260 1,455 345 1,250 1,735 1,770
MFCB43.5 68 (14) 3 1/2 Min. 4 170 755 755 755 220 1,105 1,120 1,120 410 1,530 2,630 1,595
Max. 6 205 1,130 1,130 1,130 265 1,265 1,385 1,545 410 1,605 2,630 1,770
FCB45.5 54 (16) 5 1/2 Min. 4 120 755 755 755 180 1,105 975 945 345 1,105 975 1,325
Max. 9 155 1,100 1,260 1,180 210 1,105 1,260 1,485 345 1,105 1,735 1,925
MFCB45.5 68 (14) 5 1/2 Min. 4 170 755 755 755 220 1,105 1,120 1,030 410 1,530 2,630 1,595
Max. 9 205 1,265 1,260 1,780 265 1,265 1,385 2,315 410 1,605 3,205 2,025
FCB47.5 54 (16) 7 1/2 Min. 4 90 755 755 220 135 1,105 945 330 260 1,105 945 365
Max. 12 205 1,100 1,260 705 265 1,105 1,260 1,050 345 1,105 1,735 1,445
MFCB47.5 68 (14) 7 1/2 Min. 4 170 755 755 755 220 1,105 1,120 870 410 1,580 2,630 1,105
Max. 12 205 1,265 1,350 1,780 265 1,265 1,760 2,315 410 1,605 3,350 2,700
FCB49.5 54 (16) 9 1/2 Min. 4 90 755 755 170 110 1,105 945 255 110 1,105 945 365
Max. 12 205 1,100 1,260 750 265 1,105 1,260 1,115 345 1,105 1,735 1,200
FCB411.5 54 (16) 11 1/2 Min. 4 90 755 755 140 90 1,105 920 205 90 1,105 920 365
Max. 12 205 1,100 1,260 795 265 1,105 1,260 860 345 1,105 1,735 860

FCB Allowable Anchorage Loads

Load Table - FCB Allowable Anchorage Loads
  1. Min. fastener quantity and load values – fill all round holes; max. fastener quantity and load values – fill all round and triangular holes.
  2. For additional important information, see General Information and Notes for Curtain-Wall Framing Connectors.
  3. Allowable loads are for clip anchorage only. The capacity of the connection system will be the minimum of the tabulated allowable anchorage loads the allowable load from the FCB Allowable Connector Load table above.
  4. Allowable loads for #12—24 self-drilling screws and PDPAT powder-actuated fasteners are based on installation in minimum 3/16"-thick structural steel with Fy = 36 ksi. PDPAT values are also provided for A572 steel. Values listed above maybe used where other thicknesses of steel are encountered or other manufacturers are used, provided that the fastener has equal or better tested values (see General Information and Notes for Curtain-Wall Framing Connectors). It is the responsibility of the designer to select the proper length fasteners based on the steel thickness installation.
  5. For screw fastener installation into steel backed by concrete, predrilling of both the steel and the concrete is suggested. For predrilling use a maximum 3/16"-diameter drill bit.

MFCB Allowable Anchorage Loads (lb.)

Table 2 — MFCB Allowable Anchorage Loads (lb.)
  1. Min. fastener quantity and load values — fill all round holes; Max. fastener quantity and load values — fill all round and triangular holes.
  2. For additional important information, see General Information and Notes for Curtain-Wall Framing Connectors.
  3. Allowable loads are for clip anchorage only. The capacity of the connection system will be the minimum of the tabulated values and the MFCB Allowable Connector Loads table above.
  4. Allowable loads for #12—24 self-drilling screws and PDPAT powder-actuated fasteners are based on installation in minimum 3/16"-thick structural steel with Fy = 36 ksi. PDPAT values are also provided for A572 steel. Values listed above maybe used where other thicknesses of steel are encountered or other manufacturers are used, provided that the fastener has equal or better tested values (see General Information and Notes for Curtain-Wall Framing Connectors). It is the responsibility of the designer to select the proper length fasteners based on the steel thickness installation.
  5. For screw fastener installation into steel backed by concrete, predrilling of both the steel and the concrete is suggested. For predrilling use a maximum 3/16" diameter drill bit.

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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