The first product of its type to undergo full-scale cyclic research testing to determine its load capacities in real-world conditions, the SCS is a hybrid clip designed specifically to allow both slide-clip or fixed-clip applications in areas of high seismic activity. Everything about the SCS clip — from its heavy-duty 10- and 12-gauge steel manufacturing to its strategically placed darts to the location of its fastener slots and holes — has been engineered to provide exceptional resistance to in-plane seismic loads. Because slide-clip testing shows that attachment at the first slot is most critical to in-plane capacity, the SCS is designed to accommodate two large washer screws (included) at the first slot attached to the stud.
The SCS clip is the most versatile clip on the market making it the ideal clip in seismic and non-seismic areas. This clip has three prepunched oblong slots for slide applications and a pattern of round holes for fixed-clip applications to meet a range of load needs. In addition, the support leg features anchor holes for concrete supports using 1/4"- or 1/2"-diameter concrete screws or bolts, plus smaller holes for steel supports using powder-actuated fasteners such as Simpson Strong-Tie® PDPAT 0.157"-diameter pins or #12 self-drilling Strong-Drive® XL Large-Head Metal screws.
The clips come in lengths of 3 1/2", 6" and 8"
Slide slots used with shouldered washer screws (included) allow a full 1" of vertical deflection
Precision-located stiffeners enhance strength while allowing ductility
Allowable anchorage loads are also limited by the SCS Connector Loads above for slide applications and fixed applications. Use the minimum tabulated values from the connector and anchorage load tables as applicable.
Allowable loads for 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 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.
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.
F1, F2, F3 and F4 load directions are the same as SCS Connector Loads above for slide applications and fixed applications.
SCS Allowable Anchorage Loads to Concrete
Allowable anchor capacities have been determined using ACI 318-14 Chapter 17 calculations with a minimum concrete compressive strength (f'c) of 3,000 and 4,000 psi in normal-weight concrete. Tabulated values shall be multiplied by a factor (λa) of 0.6 for sand light-weight concrete.
Load values are for group anchors based on ACI 318, condition B, load factors from ACI 318-14 Section 5.3, no supplement edge reinforcement, Ψc,v = 1.0 for cracked concrete and periodic special inspection.
Allowable Stress Design (ASD) values were determined by multiplying calculated LRFD capacities by a conversion factor, Alpha (a), of 0.70 for seismic load and 0.6 for wind loads. ASD values for other combinations may be determined using alternate conversion factors.
Tabulated allowable ASD loads for Wind and Seismic in SDC A&B are based on using wind conversion factors and may be increased by 1.17 for SDC A and B only.
Design loads shall include the over-strength factor per ASCE7 Section 12.4.3. For fasteners in exterior wall connection systems, Ωo = 1.5 per Table 13.5-1.
Tabulated allowable loads are based on anchorage only. The capacity of the connection system shall be the minimum of the allowable anchorage load and the SCS allowable connector loads above for slide applications and fixed applications.
Shaded values are limited by connector serviceability and strength in a single fastener anchorage.
For anchor subjected to both tension and shear loads, it shall be designed to satisfy the following:
For Na / Nall ≤ 0.2, the full allowable load in shear is permitted.
For Va / Vall ≤ 0.2, the full allowable load in tension is permitted.
For all other cases, Na / Nall + Va / Vall ≤ 1.2, where Na = Applied ASD tension load. Nall = Allowable F2 or F3 load column from SCS allowable anchorage loads to concrete table. Va = Applied ASD shear load. Vall = Allowable F4 or F1 load column from the SCS allowable anchorage loads to concrete table.