support for trimmers

[^woody^]

I've never understood why they are called dog tooth connectors

It's from the cloth which has this pattern.

 

[^woody^]

Seems a bit overkill to me but anyone want to offer up any advice on the matter?

You should never screw into endgrain, and skew nailing/screwing is not good for the vertical loading of a trimmer.

That why you need hangers or a bearer beneath any trimmer or joist so that the timber sits on something.

 

[Deleted member 174758]

I gave up using the star washers a long time ago as they always pushed the joist appart (or can someone tell me the trick), and I didn't feel it was as secure a job.

In general it's structural engineers who insist on the things. In the past when we did them I used to use a tank cutter with a pilot rod to cut a groove wher the teeth would be on both the joining faces, but last year on the current project, we were doing loads of joist end repairs (7 x 2s up to 10 x 3s) and I simply took to drilling thenm and tightening the bejaysus out of the high tensile bolts (coach bolts have a tendency to turn , I find) using an impact wrench (not a driver, but a 1/2in square drive wrench). That had no problems getting the teeth to dig in and was more effective than using a socket set at getting a good, well-connected joint when end repairing 150 year old pitch pine beans whech were often anything other than flat

Stick a few more nails in the hangers, and you'll have a good belt and braces job there (otherwise it'll just be consider for show).

Technically every hole is suppose to be filled with a twist nail or it might be considered a "pull"

 

[Deleted member 174758]

Stick a few more nails in the hangers, and you'll have a good belt and braces job there (otherwise it'll just be consider for show). Now what about the joists going from the trimmer.