DSSCB Bypass Framing Drift Strut Connector

DSSCB Allowable Slide-Clip Connector Loads

1. For additional information, see Innovative Solutions for Curtain-Wall Framing.
2. DSSCB Allowable Slide-Clip Connector Loads are also limited by the Strut Channel Allowable Anchorage Load to Steel table below or Concrete Insert Allowable Load Embedded to Concrete below. Use the minimum tabulated values from the connector and anchorage load tables as applicable.
3. See illustrations in the image gallery for shouldered screw fastener pattern placement to stud framing.
4. Tabulated F₁ loads are based on assembly tests with the load through the centerline of the stud. F₁ loads require DSHS connector with (1) #10 screw to strut.

DSSCB Allowable Fixed-Clip Connector Loads

1. For additional information, see Innovative Solutions for Curtain-Wall Framing.
2. DSSCB Allowable Fixed-Clip Connector Loads are also limited by the Strut Channel Allowable Anchorage Load table below. Use the minimum tabulated values from the connector and anchorage load tables as applicable.
3. See illustrations in the image gallery for screw fastener pattern placement to stud framing.
4. Tabulated F₁ loads are based on assembly tests with the load through the centerline of the stud. F₁ loads require DSHS connector with (1) #10 screw to strut.
5. In-plane capacities (F₁) for DSSCB attached to 54 mil (16 ga.) stud can be increased to 500 lb. with the addition of a shoulder screw at first slot from bend line for screw pattern K and L and at middle slot for pattern M (reference patterns shown to the right).

Strut Channel Allowable Anchorage Loads to Steel

1. For additional information, see Innovative Solutions for Curtain-Wall Framing.
2. Allowable anchorage loads are also limited by the DSSCB Connector Load tables above. Use the minimum tabulated values from the connector and anchorage load tables as applicable.
3. Allowable loads are based on 97 mil (12 ga.) thickness strut channel members with a minimum yield strength, F_y, of 33 ksi, tensile strength, F_u, of 45 ksi. Tabulated values for Unistrut P4520, 1 5/8" x 13/16" channel may be used for Unistrut channel 1 5/8" x 7/8" models P3300, P33HS and P3300T.
4. Allowable loads for self-drilling screws are based on installation in minimum 3/16"–thick structural steel with F_y = 36 ksi. Values listed above may be used where other thicknesses of steel are encountered provided that the fastener has equal or better tested values into thicker steel. 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. Screw to be installed through steel portion of channel strut (1.5 x screw diameter from punch-out) and centered vertically in web.
6. For any connector occuring within 2" of channel strut splice, load not to exceed — F₂ = 865 lb. and F4 = 785 lb.
7. Maximum allowable load of strut channel can be increased at high concentrated loads by welding each flange 1 1/2" from the strut channel to support directly at clip location:
   For 13/16" strut size — F₁ = 775 lb., F₂ = 1,430 lb., F₃ = 2,540 lb. and F₄ = 1,050 lb.
   For 1 5/8" strut size — F₁ = 775 lb., F₂ = 1,870 lb. F₃ = 3,630 lb.
8. Required weld length is on each flange at spacing indicated.
9. Anchorage spacing cannot be greater than framing spacing.
10. Connector load to be located a minimum of 2" from end of strut channel.
11. Simple-span allowable load values are applicable where the strut channel is connected at two points to the structural steel support and the connector load occurs between the fastening points. Multi-span allowable load values are applicable where the strut channel is connected at multiple points (three or more fasteners) to the structural steel support and the connector load can occur in between any of the fastening points.
12. Tabulated values for 13/16" strut may be used for 7/8" struts.
13. Tabulated F₂ loads include an adjustment factor of 0.90 for pierced strut channels. For pierced strut channels that have an 0.85 adjustment factor, the F₂ loads shall be multiplied by 0.95 factor. No adjustment is required for F₁, F₃ and F₄ loads.

Concrete Insert Allowable Load Embedded to Concrete

1. For additional important information, see General Notes.
2. The designer is responsible for concrete slab design. The minimum tested concrete slab thickness is 8-inch. Minimum end distance, and edge distances for concrete insert struts are shown in the image gallery above.
3. Tabulated values are for concrete compressive strength f'c=4000 psi minimum. For 3000 psi or 3500 psi, apply a load adjustment factor of 0.87 or 0.94, respectively.
4. Allowable anchorage loads with concrete insert are also limited by the DSSCB Allowable Fixed-Clip Connector Loads and Allowable Slide-Clip Connector Loads shown above. Use the minimum tabulated values from the connector and strut anchorage load table above as applicable.
5. Allowable loads are based on 97 mil (12 ga.) thickness strut channel members with a minimum yield strength, Fy, of 33 ksi, tensile strength, Fu, of 45 ksi. Strut size dimensions are illustrated in the image gallery above. Other strut manufacturer with equivalent performance and dimensions may be used as approved by the designer.
6. Tabulated values are for connector load spacing at 16-inch minimum. Reduce load linearly for connector spacing less than 16 inch. For example, shear connector load (F4), with 2-inch edge distance from the top of slab at 12-inch spacing is 1440 lb. * (12"/16") = 1080 lb.
7. Tabulated values are for clips installed 6-inch minimum from the end of strut. See minimum end distances from strut to concrete illustrated in the image gallery above.
8. Shear load (F4) may be linearly interpolated for strut embedded between 2-inch from the top to 3-inch from the bottom of the concrete slab.
9. Allowable loads are based on testing in accordance with AC398 in Simpson Strong-Tie's IAS accredited test lab.

DSSCB Standoff Distances

12 ga. 33 ksi Concrete Insert (by others)

12 ga. 33 ksi Concrete Insert
(by others)

Code Reports & Compliance

Drawings