Successfully attaching a ledger to a cinder block can be accomplished by using the right hardware.
Attaching posts to deck blocks.
Deck framing page 16 beam to post page 12 post to concrete page 11 joist to beam page 14 a system of key connections throughout the deck framing also known as a continuous load path is essential to building a safe code compliant deck.
The main difficulty in using deck blocks with posts is that the indentation for the posts.
Assume that all deck piers and foundation blocks require some digging.
They should be laid out similarly to deck posts with the caveat that the spacing should be a little closer together around five feet or so beneath the beams.
Unlike a concrete footing that distributes the weight of the structure over a large area piers concentrate the load to a small area.
There are a handful of manufacturers that produce epoxy and other adhesive anchors that are tested for use in hollow cmu.
This allows the insertion of a concrete bolt designed to secure a metal post anchor to the block.
When this system of connections is made properly loads are transferred.
Today s options for attaching posts to deck surfaces.
How to use deck blocks.
The idea of quickly installing a post where you want on either a wood framed deck concrete or even stone surface is appealing.
This is the foundation of the deck and if not properly installed will result in failure of part or the entire deck.
Use bolts not nails or screws to fasten railing posts to deck framing.
Deck piers support the beams that create the joist spans for a deck.
Use blocking and bolts to create a strong railing connection at the rim joist.
However concrete deck blocks can be used without restriction for a freestanding deck that s not attached to your house.
Some blocks have a hole in the center.
Yes there are products available for anchoring a ledger board to hollow concrete block foundations concrete masonry unit cmu.
Incorrectly attaching guardrail posts.
Can i attach my deck to a hollow block concrete foundation.