The PPBZ porch base offers a simplified, one-time installation designed to support permanent porch framing throughout all stages of construction. This design eliminates the need for temporary vertical support and streamlines the subcontractor scheduling process while still providing adequate safety to enable full access for installers/inspectors.
The porch post base is fastened to the footing with two Simpson Strong-Tie® Titen® masonry screws when framing the porch roof. Then, when the time is right, the concrete contractor is able to complete the last phase of the porch slab without the interference of temporary vertical support and without the framer having to return to the jobsite after the slab has hardened. Designed to withstand vertical construction loads prior to embedment in concrete, the PPBZ will support the weight of most framed porches and overhangs.
Stiffened embedded side stirrups provide temporary vertical download support without being embedded into concrete
1" standoff reduces the potential for decay at post or column ends
Two available sizes provide both 4"- and 6"- slab thicknesses
Pre-pour installation eliminates temporary support
No disruption in scheduling
Eliminates additional move-ins by trades and certain inspection call backs
Use all specified fasteners; see General Notes.
Locate and place PPBZ on footing according to framing plans.
Secure PPBZ to footing with (2) (1/4" dia. x 1 1/4" long hex-head) Titen® concrete screws located a minimum of 1 1/2" from the edge of concrete.
Attach 4x4 post to PPBZ using (12) 10d common (0.148" dia. x 3" long) nails. After bracing the top and bottom of the post from lateral movement, the post may then be loaded in download or uplift.
When ready, pour concrete porch slab (4" or 6") up to the bottom of the standoff base while maintaining minimum 1" concrete side coverage.
Loads may not be increased for short-term loading.
Concrete shall have a minimum compressive strength,, f'c = 2500 psi.
Multiply Seismic and Wind ASD load values by 1.4 or 1.6 respectively to obtain LRFD capacities.
In accordance with IBC Section 1613.1, detached one- and two- family dwellings in Seismic Design Category (SDC) C may use “Wind and SDC A&B” allowable loads.
Downloads shall be reduced where limited by the design capacity of the post. See Post Capacities for common post allowable loads.
Designer is responsible for concrete strength.
For full loads, 1" concrete side cover is required on all sides.
Structural composite lumber columns have sides that either show the wide face or the edges of the lumber strands/veneers known as the narrow face. Values in the tables reflect straps nailed to the wide face. Do not nail PPBZ straps to the narrow face of SCL columns.