Fork anchor - suitable choice

[Hawkai]

Yay

I'm planning to set up a ledger/header beam parallel to the house's facade hanging from the house's rafters. The header beam will support the rafters for the sunroom. Are fork anchors a suitable choice for hanging a header beam? Fork anchors or ridge anchors are the only fittings I find that "twist" 90 degrees

http://www.jula.se/gaffelankare-340073
http://www.jula.se/takasfaste-312215

 

[pbengtsson]

Or 2"2 down on each side of the truss where you place the support beam.

 

[Hawkai]

Or 2"x2" down on each side of the truss where you place the bärlina.

How do I best attach a 2"x2"? 2-3 anchor nails in a row (vertically) in the truss and 2-3 in the bärlina? A little zigzag? How close to the edge in the 2"x2" can I attach the nail?

 

[Hawkai]

Is there any difference in strength with fork anchors compared to 2"2 that one should consider? Thinking about the snow load.

 

[pbengtsson]

Easiest is screw, 6x100mm. Two in the truss and two/three in the beam. Otherwise, nail with 100mm nails. 2"2=45x45mm wooden stud, was a bit unclear.

 

[pbengtsson]

Fork anchors are designed for purposes other than hanging things, but it might certainly work.

 

[Hawkai]

I have 3 proposals for attaching the rafters to the beam:

1. Attach the rafters with screws/nails from the back of the beam into the end grain of the rafter?

2. Joist hanger, but they are so ugly...

3. Attach both the beam and the sunroom rafters into the 45x45-rule. The rules are attached to the long side of the beam facing the sunroom. Then attach the rafters with screws "around the corner" on the rule. In this case, the screws for the beam and the rafters will cross each other.

Option 2 feels the safest, but as mentioned, it's aesthetically ugly. If options 1 and 3 are not reliable, then the joist hanger is the only one left.

 

[pbengtsson]

1. Can work, but then they need to be quite long screws >140mm, nails won't work at all.
2. Spruce them up with a bit of paint and rounded corners, and maybe they'll be livable.
3. Then you can skip the support beam entirely and set the rafters at the same center-to-center as the house rafters and hang them with 45x45 studs on each side.

 

[Hawkai]

3. Then you can skip the beam altogether and set the rafters at the same center-to-center as the house rafters and hang them with 45x45 battens on each side.

That's how it's done now, except it's facade board, like 22x120 instead of 45x45 The conservatory already exists but I'm going to put a new roof that requires narrower CC between the rafters.

Great, then I've probably solved yet another problem tonight after all! Thx

 

[danlin]

How did it turn out?