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A look at timber connections

From Daizen News, 1 January 2012

In the Whistler round-to-square home, we saw some timber and heavy steel together. Now, let’s talk about joining timber to concrete. When frame posts have concrete bases–not uncommon–there must be a way to connect the timber to the concrete. Key factors are stability: prevention of horizontal movement, vertical

movement, and pivot; uplift; gravity; and moment. Further, since concrete retains moisture, a vapor barrier is needed between the two materials.

Daizen focuses on three methods: epoxy to epoxy, epoxy to mechanical, and steel plate.

As part of our epoxy testing, we compared four epoxy samples, two with a ¾-in. ready rod into timber of 6- and 12-in. sides and then two with a 1-in. ready rod into timber of 6- and 12-in. sides.

We’re summarizing our ideas about connections–an issue right at the heart of timber framing–through a series of articles: the Timber Connection Series. The first, Post to Concrete, is now available as a download

from the daizen.com website.

Interested in finding out more?

At Daizen, we ensure client expectations and understanding of processes are met through all phase of our work, from structural design and engineering to fabrication of timber frames and assembly and installation.