The Simpson PPB44-4Z Porch Post Base from Simpson Strong-Tie is a pre-pour connector engineered to support permanent porch framing throughout every stage of construction, from initial framing through final slab completion. Sized for a nominal 4x4 post and a 4-inch slab thickness, this base fastens to the footing using Titen Turbo masonry screws before the concrete is ever poured, eliminating the need for temporary vertical support and keeping the project moving without costly interruptions. Built from 12-gauge steel with ZMAX galvanization, it is designed for the demands of exterior and treated-wood porch applications where corrosion resistance is essential.

Key Features

• Stiffened embedded side stirrups provide temporary vertical download support without being embedded into concrete - the post and framing can carry construction loads before the slab is poured, so the project timeline is never held hostage to concrete scheduling.
• 1 in. standoff between the post base and the slab surface - keeps the end of the post or column elevated above moisture, reducing the potential for decay and extending the life of the framing.
• Pre-pour installation eliminates temporary support - one crew, one visit to set the base and frame the porch roof, with no need to rig or remove temporary shoring at any point.
• No disruption in scheduling and no additional trade move-ins - the concrete contractor can pour and finish the slab independently, without waiting on the framing crew to clear temporary supports or return to the site afterward.
• Eliminates additional move-ins by trades and certain inspection callbacks - the simplified, single-phase installation reduces coordination overhead and keeps inspections on track.
• Sized to fit a nominal 4x4 post and 4-inch slab thickness - purpose-built dimensions mean no field modification is needed for standard porch post applications.
• 12-gauge steel construction - provides the structural integrity needed to withstand vertical construction loads prior to embedment, supporting the weight of most framed porches and overhangs.
• ZMAX galvanization offers extra corrosion resistance for exterior and treated-wood applications - the coating is specifically suited to the harsh chemical environment created by pressure-treated lumber, helping the connector maintain its integrity over time.

Why This Product

• One-time installation from framing through finish concrete - because the base handles temporary vertical load support on its own, the framing crew installs it once and walks away, and the concrete contractor finishes the slab on their own schedule without interference or rework.
• Engineered to carry real construction loads before the slab exists - the stiffened side stirrups are designed to withstand the vertical download of most framed porch roofs and overhangs prior to concrete embedment, giving contractors confidence to proceed without supplemental shoring.
• Built-in moisture protection for long-term performance - the 1-inch standoff combined with ZMAX galvanization addresses two of the most common failure points in exterior post bases: end-grain decay from ground moisture and corrosion from treated-wood preservatives.
• Reduces jobsite coordination and scheduling friction - by eliminating temporary support structures, additional trade move-ins, and framer return trips after the slab hardens, this porch post base simplifies the subcontractor scheduling process for the entire porch construction sequence.

Specifications

• Model Number: PPB44-4Z
• Brand: Simpson Strong-Tie
• Member Size: 4x4
• Depth: 4 in.
• Width 1: 3-5/8 in.
• Width 2: 3-3/8 in.
• Height: 5-3/4 in.
• Gauge: 12
• Coating: ZMAX
• Finish: ZMAX
• Country of Origin: United States

Install With

• Install with (12) 0.148 in. x 3 in. Strong-Drive SCN Smooth-Shank Connector nails (Model: 10DHDG) and (2) 1/4 in. x 1-1/4 in. Titen Turbo concrete screws (Model: TNT25114H)

Frequently Asked Questions

How is the PPB44-4Z installed prior to the concrete pour?

The porch post base is fastened to the footing with two Simpson Strong-Tie Titen Turbo masonry screws when framing the porch roof. The stiffened embedded side stirrups provide temporary vertical download support without being embedded into concrete, allowing construction to proceed before the slab is poured.

Does this base require the framer to return to the jobsite after the slab has hardened?

No. The pre-pour installation approach means that once the base is set and framing is complete, the concrete contractor can finish pouring the slab without interference from temporary vertical support, and the framer does not need to return after the slab has hardened.

What post size and slab thickness is this base designed for?

The PPB44-4Z is sized to fit a nominal 4x4 post and is designed for use with a 4-inch slab thickness.

Why is ZMAX galvanization important for this application?

ZMAX galvanization offers extra corrosion resistance specifically suited for exterior and treated-wood applications, making it appropriate for porch and outdoor framing environments where moisture exposure and contact with treated lumber are common concerns.

Note: Product dimensions may differ from picture.