{"product_id":"simpson-strong-tie-zmax-galvanized-moment-post-base-for-6x6-w-sds-screws-mpb66z","title":"Simpson Strong-Tie ZMAX Galvanized Moment Post Base for 6x6 w\/ SDS Screws (MPB66Z)","description":"\u003csection data-aplus\u003e\u003cdetails id=\"product-features\" class=\"acc\" open\u003e\u003csummary\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\u003cdiv class=\"features\"\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cdiv class=\"card-inside\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/accuracy.svg\" alt=\"accuracy\" class=\"aplusicon\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eBuilt for Moment Loads\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"feature-card\"\u003eThis Simpson Strong-Tie MPB66Z MPBZ ZMAX Galvanized Moment Post Base for 6x6 is designed to help resist post rotation at the base. That gives builders a cleaner way to support wood columns where lateral forces matter.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cdiv class=\"card-inside\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/depth.svg\" alt=\"depth\" class=\"aplusicon\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e1 Inch Standoff\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"feature-card\"\u003eInternal tabs hold the post 1 inch above the concrete. That spacing helps limit moisture contact at the end of the post and gives water a path to drain instead of sitting where rot starts.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cdiv class=\"card-inside\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/case-included.svg\" alt=\"case-included\" class=\"aplusicon\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eScrews Included\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"feature-card\"\u003eThe MPB66Z includes Simpson Strong-Tie Strong-Drive SDS heavy-duty connector screws sized for this base. That saves a parts chase and keeps the connection aligned with the manufacturer's installation requirements.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-overview\" class=\"acc\"\u003e\u003csummary\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\" data-product-summary\u003e\n\u003cp\u003eThe Simpson Strong-Tie MPB66Z MPBZ ZMAX Galvanized Moment Post Base for 6x6 is a cast-in-place wood-to-concrete post base made for supporting 6x6 wood posts in deck and column applications. This is a moment post base designed for post-to-footing connections where resistance to rotation matters. Model Number: MPB66Z.\u003c\/p\u003e\n\u003cp\u003eWhat separates this connector from a basic post base is the sleeve-style body that wraps the post and helps keep it from rotating when lateral loads are applied higher up the column. In practical terms, that gives designers and builders another way to handle freestanding or lightly braced post conditions without jumping straight to custom-fabricated hardware. Simpson positions the MPBZ line specifically for moment resistance, and that is the reason this part exists.\u003c\/p\u003e\n\u003cp\u003eThe MPB66Z is built from 12-gauge steel and finished with ZMAX coating for added corrosion resistance in exterior and treated-wood applications. For a connector that lives at the concrete line, that matters. The base is also a one-piece design, which keeps installation simpler than piecing together multiple parts and helps keep the geometry consistent when you are setting forms and checking embedment.\u003c\/p\u003e\n\u003cp\u003eSimpson added several jobsite-friendly details that are easy to miss until you are the one installing it. Internal top-of-concrete tabs and stamped embedment indicators help you position the base before the pour. Strategically placed holes allow template attachment, which makes layout easier during form work. Optional holes for trim attachment are there if appearance matters on a finished column wrap.\u003c\/p\u003e\n\u003cp\u003eMoisture management is another strong point here. The internal tabs create the code-required 1 inch standoff between the wood post and the concrete surface, helping reduce direct exposure to standing water and ground moisture. Simpson also includes weep and drain openings at the embedment line so water can exit and so the installer has a visual reference point after the concrete cures. That is the kind of detail that matters long term, not just on install day.\u003c\/p\u003e\n\u003cp\u003eThis post base is intended to be installed before concrete is placed. The manufacturer also specifies using the supplied Strong-Drive SDS heavy-duty connector screws rather than substituting lag screws, because lag screws will not achieve the same load. For contractors, that means faster fastening and fewer surprises. For inspectors and specifiers, it means the connection is being assembled the way the tested system was intended.\u003c\/p\u003e\n\u003cp\u003eThe MPB66Z is a good fit for decks, post-to-footing work, outdoor structures, and other projects using a 6x6 wood column over a cast-in-place concrete footing. It is best suited for builders, deck contractors, general contractors, and serious DIY users who need a stronger engineered base than a standard standoff connector. If your project needs a 6x6 post base that helps manage rotation, keeps the post off the concrete, and comes with the right screws, this is the one to look at.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-benefits\" class=\"acc\"\u003e\u003csummary\u003e\u003ch2\u003eBuilt to Keep Posts Stable at the Base\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"img\"\u003e\u003cimg src=\"https:\/\/ssttoolbox.widen.net\/content\/m5kgwasrkb\/jpeg\/C_MPB66Z_ProdPho_Pho_Prod_MomentPostBase_C0.jpeg?position=c\u0026amp;color=ffffffff\u0026amp;u=cjmyin\" alt=\"Simpson Strong-Tie MPB66Z moment post base product photo showing the galvanized 6x6 cast-in-place connector body for a wood post on a concrete footing\" class=\"tnblock-img\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"copy\"\u003e\n\u003cp\u003eThis base is built around controlling rotation, not just holding a post in place. The tall sleeve design wraps the lower section of the 6x6 post so the connection does more than a basic saddle-style base.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for wood columns and posts where moment resistance is required\u003c\/li\u003e\n\u003cli\u003eOne-piece 12-gauge steel construction with ZMAX corrosion-resistant coating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-benefits-2\" class=\"acc flip\"\u003e\u003csummary\u003e\u003ch2\u003e\u003ch3\u003eSimpson Strong-Tie MPB66Z MPBZ ZMAX Galvanized Moment Post Base for 6x6 Dimensions and Drainage Details\u003c\/h3\u003e\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"img\"\u003e\u003cimg src=\"https:\/\/ssttoolbox.widen.net\/content\/9r1ouovxfk\/jpeg\/C_MPB44Z_ProdIll_Ill_Prod_MomentPostBase_CY.jpeg?position=c\u0026amp;color=ffffffff\u0026amp;u=cjmyin\" alt=\"Diagram of a Simpson Strong-Tie moment post base showing width height depth embedment line and 1 inch standoff details for cast-in-place wood post installation on concrete\" class=\"tnblock-img\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"copy\"\u003e\n\u003cp\u003eThe geometry here is not just about fit. The standoff, embedment line, and drain path all work together so the base installs correctly in the footing and helps keep water from getting trapped at the end of the post.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInternal tabs create a 1 inch standoff above the concrete surface\u003c\/li\u003e\n\u003cli\u003eStamped embedment indicators and drainage openings help with correct placement and water exit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-whats-included\" class=\"acc\" open\u003e\u003csummary\u003e\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\u003cdiv class=\"tnincluded-wrapper\"\u003e\u003cul\u003e\n\u003cli\u003e(1) Simpson Strong-Tie MPB66Z moment post base\u003c\/li\u003e\n\u003cli\u003eSimpson Strong-Tie Strong-Drive SDS heavy-duty connector screws for installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-key-specifications\" class=\"acc\" open\u003e\u003csummary\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\u003ctable class=\"aplusspecs\"\u003e\n\u003ctr\u003e\n\u003cth\u003ePost Size\u003c\/th\u003e\n\u003ctd\u003e6 in x 6 in nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e12-gauge steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eZMAX galvanized coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eWood to concrete, cast in place\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003ctd\u003e5-9\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003ctd\u003e7-1\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDepth\u003c\/th\u003e\n\u003ctd\u003e7-1\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e10.7 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePackage Quantity\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded Fasteners\u003c\/th\u003e\n\u003ctd\u003e1\/4 in x 2-1\/2 in Simpson Strong-Tie Strong-Drive SDS heavy-duty connector screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-applications-uses\" class=\"acc\"\u003e\u003csummary\u003e\u003ch2\u003eBuilt For\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\u003cdiv class=\"tags\"\u003e\n\u003cspan class=\"tag\"\u003eDeck Building\u003c\/span\u003e\u003cspan class=\"tag\"\u003ePost-to-Footings\u003c\/span\u003e\u003cspan class=\"tag\"\u003eOutdoor Structures\u003c\/span\u003e\u003cspan class=\"tag\"\u003eGeneral Contracting\u003c\/span\u003e\u003cspan class=\"tag\"\u003eRemodeling\u003c\/span\u003e\u003cspan class=\"tag\"\u003eConstruction\u003c\/span\u003e\u003cspan class=\"tag\"\u003eDIY \/ Hobbyist\u003c\/span\u003e\u003cspan class=\"tag\"\u003e6x6 Wood Posts\u003c\/span\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-pro-tips\" class=\"acc\"\u003e\u003csummary\u003e\u003ch2\u003ePro Tip\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\u003cdiv class=\"tip-row\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-lg\"\u003e\u003cp class=\"tip-text\"\u003eSet the MPB66Z before the concrete pour and watch the embedment indicators closely. Also keep the concrete level inside the base no more than 1\/4 inch above the embedment line so the drainage path still works like it should.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-tool-nut-take\" class=\"acc\"\u003e\u003csummary\u003e\u003ch2\u003eTool Nut's Take\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\n\u003cdiv class=\"eyebrow\"\u003eTool Nut's Take\u003c\/div\u003e\n\u003ch3\u003eA serious post base for jobs where a basic saddle is not enough\u003c\/h3\u003e\n\u003cp\u003eThe Simpson Strong-Tie MPB66Z is the kind of connector you buy when you need engineered rotation resistance, cleaner post support, and a better long-term detail at the concrete line.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Deck builders, contractors, and owner-builders setting 6x6 posts into cast-in-place footings where stability and moisture separation both matter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The sleeve design, 1 inch standoff, drainage detail, and included SDS screws make it more complete than a standard post base.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e This one rewards careful layout and concrete work. Follow the install instructions closely and use the specified screws, because this is a tested system, not a place to improvise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails id=\"product-faqs\" class=\"acc\"\u003e\u003csummary\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\u003c\/summary\u003e\u003cdiv class=\"acc-body\"\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat size post does the MPB66Z fit?\u003c\/strong\u003e It is designed for a nominal 6x6 wood post.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs this a cast-in-place post base?\u003c\/strong\u003e Yes. The MPB66Z is installed before the concrete is placed and is intended for wood-to-concrete cast-in-place applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes it keep the post off the concrete?\u003c\/strong\u003e Yes. Internal tabs create a 1 inch standoff above the top of the concrete to help reduce moisture exposure at the end of the post.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan lag screws be used instead of the supplied SDS connector screws?\u003c\/strong\u003e No. Simpson specifically states that lag screws will not achieve the same load.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/section\u003e","brand":"Simpson Strong-Tie","offers":[{"title":"Default Title","offer_id":52999304642854,"sku":"MPB66Z","price":227.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/MPB66Z_00707392343783_Product_Photo_01_7691d39c-c789-4751-8d21-56e762fe685f.jpg?v=1779135461","url":"https:\/\/www.toolnut.com\/products\/simpson-strong-tie-zmax-galvanized-moment-post-base-for-6x6-w-sds-screws-mpb66z","provider":"Tool Nut","version":"1.0","type":"link"}