ᐅ How can I attach roof beams to a masonry wall?

Created on: 29 Aug 2016 21:57
S
sauerpeter
Hello,

so our shed, about 60 sqm (645 sq ft), is getting a new roof. When we bought the property, the roof had collapsed. Now my question is, how do I secure the beams on top of the wall? At the front, they extend a bit beyond the wall. The shed is 4.68 m (15 ft 4 in) wide and the beams are 5.10 m (16 ft 9 in) long.
I rebuilt the top row of blocks with aerated concrete to create a level surface. Is it enough to just lay the beams on the walls and fasten them with metal brackets on the left and right sides? Or is that not sufficient? The brackets would be 105 x 105 x 90 mm (4 x 4 x 3.5 inches) and the roof beams are 80 x 160 mm (3 x 6 inches).
Or should I use joist hangers? Or can I screw the beams directly into the aerated concrete?
So many questions, and I just don’t know what would be best. It should also hold securely. Or should I embed the beams fully in the wall?
Neige29 Aug 2016 23:21
I completely agree with @Sebastian79. In my opinion, he is right. Even if it is just a shed, there are still several important factors to consider, such as snow load, wind load, and so on.

Where is the problem in consulting a carpenter who is experienced in this area? It makes no sense to give advice without knowing the location or the construction method.
K
Knallkörper
29 Aug 2016 23:45
So, a 4-meter (13 feet) span with 160mm (6.3 inches) beams is sufficient for snow load, and there is no wind load to consider (since it is a flat roof, right?).
T
toxicmolotof
30 Aug 2016 00:23
And if someone is underneath when it bangs or cracks, the complaints are loud.
S
sauerpeter
30 Aug 2016 10:41
Yes, it is a flat roof. Even if you ask a carpenter, it can collapse. And even then, the complaints will be loud.
S
sauerpeter
30 Aug 2016 10:43
Perhaps I should also mention that the slope runs across the short width of 4.68m (15 ft 4 in). In this case, I think joist hangers that are screwed to the wall might not work well.
Oh well, I think I’ll just cover it with a tarp.