Portal Frame Connection Kit is required to achieve increased load
values listed for portal frame system.
SSWPS straps must be installed on exterior face of the Steel
Strong-Wall shearwall. Position header flush with exterior face of the
Steel Strong-Wall shearwall.
Do not cut the Steel Strong-Wall or enlarge existing holes. Doing so
will compromise the performance of the wall.
Do not use an impact wrench to tighten nuts on the
Maximum shim thickness between the Steel Strong-Wall and
header is 7/8" using Simpson Strong-Tie Strong-Drive® 1/4" x 3 1/2"
SDS Heavy-Duty Connector screws.
Walls with 2x4 preattached studs may also be used in 2x6 wall
framing. Install the wall flush to exterior face of the framing and add
furring to the opposite side.
Walls may be installed with solid headers in all cases or multi-ply
headers in Wind and SDC A-C, see detail 11/SSW2.
Portal Frame Connection Kit
This installation reflects lateral load requirements of a single-wall portal system.
It is the designer’s responsibility to provide a complete load path for all loads in accordance with the governing codes.
Refer to footnotes 2, 4 and 9.
Allowable shear loads and anchor tension forces are applicable to Single-Wall Garage Portal System installation on concrete with minimum f'c = 2,500 psi using the ASD basic (Section 1605.3.1) or the alternative basic (Section 1605.3.2) load combinations. Load values include evaluation of bearing stresses.
A Double-Wall Garage Portal System consists of two walls with a header continuous across both panels.
The allowable load is twice the Single-Wall Portal value.
For seismic designs based on the 2018 IBC using R=6.5. For other codes, use the seismic coefficients corresponding to light-frame bearing walls with wood structural panels or sheet steel panels.
The minimum header size shown in the details is the minimum required for lateral rigidity of the portal system. Larger headers may be required due to
vertical loading. Support post uplift connectors may be reduced where justified by calculations.
Recommended header moisture content is 19% or less at time of installation.
Allowable shear, drift and anchor tension values may be interpolated for intermediate height or axial loads.
Tabulated anchor tension loads assume no resisting axial load. For anchor tension loads at design shear values and including the effect of axial load, refer to the Strong-Wall Selector (include K factor in uplift calculations). Drifts at lower design shear may be linearly reduced.
Longer header spans can be accommodated if larger headers are used such that equivalent stiffness is equal to or greater than that provided by the minimum header size and maximum length indicated.