PRODUCT DESCRIPTION - Click to Enlarge Inset Picture
MPB44Z Moment Post Base
MPBZ Moment Post Base
The new patent-pending Simpson Strong-Tie MPBZ is the first post base specifically designed to provide moment resistance for columns or posts. An innovative overlapping sleeve design encapsulates the post, helping to resist rotation around its base. It is available for 4x4 and 6x6 posts. The MPBZ is ideal for outdoor structures, such as carports, fences and decks. Built-in standoff tabs provide the required 1" standoff to resist decay of the post while eliminating multiple parts and assembly. Additionally, the MPBZ is available in ZMAX as the standard finish to meet exposure conditions in many environments.
Internal top-of-concrete tabs
1" standoff tabs
Additional holes provided to attach trim material
Weep hole provided for water drainage
Use all specified fasteners; see General Notes.
Install MPBZ before concrete is placed using embedment
level indicators and form board attachment holes.
Place post on tabs 1" above top of concrete.
Install Simpson Strong-Tie Strong-Drive 1/4" x 2 1/2" SDS Heavy-Duty Connector screws, which are supplied with the MPBZ. (Lag screws will not achieve the same load.)
Concrete level inside the part must remain 1/4" or less above embedment line for water drainage.
Annual inspection of connectors used in outdoor application is advised. If significant corrosion is apparent or suspected, then the wood, fasteners and connectors should be evaluated by a qualified engineer or inspector.