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Does your project require DoD-compliant blast design?

Technical & Installation Notes

General Notes
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General Product Use Information

Although Allowable Strength Design (ASD) is widely used by designers of Cold-Formed Steel (CFS) construction, some projects require additional connector limit states beyond the typical ASD values that are normally tabulated in our load tables. For example, many Department of Defense (DoD) projects require blast design of exterior wall framing and connections. Such projects may require the LRFD strength or nominal strength for the blast calculations. These limit states required for blast design are located below. Search for the particular product required for blast design to find these capacities.

Not finding what you need? Please contact Simpson Strong-Tie.

FCB Supplemental Information

The following FCB supplemental information is given to help Designers with value-engineered solutions for our FCB connectors. Loads are given for fastener patterns other than our standard "min." (fill all round holes) and "max." (fill all round and triangle holes). In addition, the tables give LRFD loads and loads for #10 screws as well as #12 screws.

Table 1: FCB Screw Patterns

Table 1: FCB Screw Patterns

Table 2: FCB Bypass Framing Fixed-Clip Connectors (FCB43.5, FCB45.5, FCB47.5 with #12–14 Screws) — Service Load Limits and Strengths (lb.)

Table 2: FCB Bypass Framing Fixed-Clip Connectors (FCB43.5, FCB45.5, FCB47.5 with #12–14 Screws) — Service Load Limits and Strengths (lb.)

See footnotes below.

Table 3: FCB Bypass Framing Fixed-Clip Connectors (FCB49.5, FCB411.5 with #12–14 Screws) — Service Load Limits and Strengths (lb.)

Table 3: FCB Bypass Framing Fixed-Clip Connectors (FCB49.5, FCB411.5 with #12–14 Screws) — Service Load Limits and Strengths (lb.)

See footnotes below.

Table 4: FCB Bypass Framing Fixed-Clip Connectors (FCB43.5, FCB45.5, FCB47.5 with #10–16 Screws) — Service Load Limits and Strengths (lb.)

Table 4: FCB Bypass Framing Fixed-Clip Connectors (FCB43.5, FCB45.5, FCB47.5 with #10–16 Screws) — Service Load Limits and Strengths (lb.)

See footnotes below.

Table 5: FCB Bypass Framing Fixed-Clip Connectors (FCB49.5, FCB411.5 w/ #10–16 Screws) — Service Load Limits and Strengths (lb.)

Table 5: FCB Bypass Framing Fixed-Clip Connectors (FCB49.5, FCB411.5 w/ #10–16 Screws) — Service Load Limits and Strengths (lb.)
  1. Calculated values are per AISI RP15-2, AISI S-100, or generally accepted industry standards. Shaded values for #12–14 screws are tabulated in this catalog and are based on testing per ICC-ES AC261. For #12–14 screws unshaded tabulated values are conservatively based on the maximum value from calculations and from the minimum (4-screw) tested values.
  2. The tabulated values do not account for anchorage to the support. Anchor strength must be calculated separately and may reduce the capacity of the connection when compared to the tabulated values.
  3. Tabulated values do not include shear, web crippling, buckling or other local effects in the member. The Designer must check member limit states separately.
  4. For load combinations that include F1 and/or F2 and/or F3, use an appropriate interaction equation.
  5. #10–16 screws shall have Pss ≥ 1,620 lb. #12–14 screws shall have Pss ≥ 2,520. Calculated values are per AISI S-100. Screws must be installed with three (min.) exposed threads.
  6. The number of screws listed is for one clip leg that is attached to the supported stud.
  7. For the minimum screw pattern, fill all round holes. For the maximum screw pattern fill all round and triangle holes. Reference Table 1: FCB Screw Patterns.
  8. Reference p. 48 for load direction definitions.
  9. In addition to calculations of net and gross section tension, and screw shear of the clip leg attached to the stud, F2 values are also calculated for weak-axis bending of the anchored clip leg with the line of bending at the holes farthest from the bend radius of the angle. The Designer is responsible for calculating pull-over, pullout and tension strength of the anchors and this may reduce F2 strength compared to the tabulated values.
  10. F3 values are computed using the plate buckling provisions of AISI RP15-2.
  11. For the F4 values it is assumed that all of the connection eccentricity is taken by screws in the supported stud. F4 values are also limited by plate shear buckling per AISI RP15-2. The Designer is responsible for calculating the shear capacity of the anchorage which may reduce F4 strength compared to the tabulated values.
  12. In addition to the limit states given in notes 9, 10 and 11, F2, F3 and F4 are also limited by screw shear according to the thinnest connected part of the connector and stud.
  13. Where test data is not available, service load limits for F2 and F3 are not given since there are no generally accepted industry methods available to compute these values. Calculated F4 service load limits are based on AISI Research Report RP15-2 for 1/8" deflection.
  14. For 50 ksi studs, 68 mil (14 ga.) and thicker, use tabulated values for 54 mil (16 ga.) — 50 ksi studs.

Supplemental Information for Slide-Clip and Rigid Connector

Table 1: SCB/MSCB Bypass Framing Slide-Clip Connector — Service Load Limits, LRFD Design Strengths and Nominal Strengths

Table 1: SCB/MSCB Bypass Framing Slide-Clip Connector — Service Load Limits, LRFD Design Strengths and Nominal Strengths
  1. Tabulated values are for the connector and attachment to the stud-wall framing. The assembly strengths are the minimum of those listed and the anchorage values listed in Table 5 on p. 66.
  2. Service Load Limit is the load at 1/8" deflection for use in evaluating the performance under service-level loads.
  3. LRFD Design Strength is the Nominal Strength multiplied by a resistance factor, φ.
  4. Nominal Strength is defined in AISI S100-07.

Table 2: SCW Head-of-Wall Slide-Clip Connector — Service Load Limits, LRFD Design Strengths and Nominal Strengths

Table 2: SCW Head-of-Wall Slide-Clip Connector — Service Load Limits, LRFD Design Strengths and Nominal Strengths
  1. Tabulated values are for the connector and attachment to the stud-wall framing. The assembly strengths are the minimum of those listed and the anchorage values listed in Table 6 on p. 67.
  2. Service Load Limit is the load at 1/8" deflection for use in evaluating the performance under service-level loads.
  3. LRFD Design Strength is the Nominal Strength multiplied by a resistance factor, φ.
  4. Nominal Strength is defined in AISI S100-07.

Table 3A: SSB Bypass Framing Slide-Clip Strut Connector — Service Load Limits, LRFD Design Strengths and Nominal Strengths

Table 3A: SSB Bypass Framing Slide-Clip Strut Connector — Service Load Limits, LRFD Design Strengths and Nominal Strengths

See footnotes below.

Table 3B: FSB Bypass Framing Fixed-Clip Connector — Service Load Limits, LRFD Design Strengths and Nominal Strengths

Table 3B: FSB Bypass Framing Fixed-Clip Connector — Service Load Limits, LRFD Design Strengths and Nominal Strengths
  1. Tabulated values are for the connector and attachment to the stud-wall framing. The assembly strengths are the minimum of those listed and the anchorage values listed in Table 5A and 5B on p. 66.
  2. Service Load Limit is the load at 1/8" deflection for use in evaluating the performance under service-level loads.
  3. LRFD Design Strength is the Nominal Strength multiplied by a resistance factor, φ.
  4. Nominal Strength is defined in AISI S100-07.

SSC Supplemental Information

The following SSC supplemental information is given to help Designers with value-engineered solutions for our SSC connectors. Loads are given for fastener patterns other than our standard "min." (fill all round holes) and "max." (fill all round and triangle holes). The tables give service, ASD, LRFD and nominal loads.

Table 1: SSC Screw Patterns

Table 1: SSC Screw Patterns

Table 2: SSC Steel Stud Connectors (SSC2.25 and MSSC2.25) — Service Load Limits and Strengths (lb.)

Table 2: SSC Steel Stud Connectors (SSC2.25 and MSSC2.25) — Service Load Limits and Strengths (lb.)

See footnotes below.

Table 3: SSC Steel Stud Connectors (LSSC4.25 and SSC4.25) — Service Load Limits and Strengths (lb.)

Table 3: SSC Steel Stud Connectors (LSSC4.25 and SSC4.25) — Service Load Limits and Strengths (lb.)

See footnotes below.

Table 4: SSC Steel Stud Connectors (MSSC4.25 and LSSC6.25) — Service Load Limits and Strengths (lb.)

Table 4: SSC Steel Stud Connectors (MSSC4.25 and LSSC6.25) — Service Load Limits and Strengths (lb.)

See footnotes below.

Table 5: SSC Steel Stud Connectors (SSC6.25 and MSSC6.25) — Service Load Limits and Strengths (lb.)

Table 5: SSC Steel Stud Connectors (SSC6.25 and MSSC6.25) — Service Load Limits and Strengths (lb.)
  1. Calculated values are per AISI RP15-2, AISI S-100, or generally accepted industry standards. Shaded values for F4are derived from test data. Whenever possible, unshaded F4 values are based on the maximum calculated value and applicable tested value.
  2. The tabulated values do not account for anchorage to the support. Anchor strength must be calculated separately and may reduce the capacity of the connection when compared to the tabulated values.
  3. Tabulated values do not include shear, web crippling, buckling, or other local effects in the member. The Designer must check member limit states separately.
  4. For load combinations that include F4 and/or F2 and/or F3, use an appropriate interaction equation.
  5. #10–16 screws shall have Pss ≥ 1,620 lb. Calculated values are per AISI S-100. Screws must be installed with three (min.) exposed threads.
  6. The number of screws is for one clip leg that is attached to the supported stud.
  7. For the minimum screw pattern, fill all round holes. For the maximum screw pattern, fill all round and triangle holes. Reference Table 1: SSC Screw Patterns.
  8. In addition to calculations of net and gross section tension, and screw shear of the clip leg attached to the stud, F2 values are also calculated for weak-axis bending of the anchored clip leg with the line of bending at the smaller anchor holes. The Designer is responsible for calculating pullover, pullout, and tension strength of the anchors, and this may reduce F2 strength compared to the tabulated values.
  9. F3 values are computed using the plate buckling provisions of AISI RP15-2.
  10. For the F4 calculated values, it’s assumed that the connection eccentricity is taken by screws in the supported stud.
  11. Service load limits for F2 and F3 are not given since there are no generally accepted industry methods available to compute these values. F4 service load limits are based on AISI Research Report RP15-2 for 1/8" deflection or applicable test data.
  12. For 50 ksi studs, 68 mil (14 ga.) and thicker, use tabulated values for 54 mil (16 ga.) — 50 ksi studs.