Reinforcement of beam

[zingo]

Renovating a small cabin. In the ceiling (towards the attic space) there is an old 120x60mm (4.2 meters long) beam that has previously been subjected to a prolonged water leak. It looks slightly weak in the middle, so I want to reinforce it with an identical beam that I plan to bolt next to the old one. The new one will rest on the same wall stud (strong timber) as the old one.

The question now is how many (12 mm thick) bolts I should use to make it a durable unit.

 

[zingo]

Anyone?

 

[ByggaNytt]

Shouldn't a constructor answer whether you should reinforce with a piece of the same length or just in the middle? How bad is the existing one, might it be time to replace it altogether?

 

[MathiasS]

Does it not matter how it looks or is executed? Then I would attach a 45x220 on each side and either nail 5" like crazy or use through bolts (primarily towards the edges). If there are braces in the middle, you of course need to support those as well.

 

[chris47]

Use assembly adhesive and first secure with some 5" nails, drill and insert 12mm through bolts with sturdy square washers. Due to the adhesive, you don't need many bolts (4pcs).
/CC

 

[zingo]

Planning to have one that is equally long and rests on the same wall rule as the old one.
Glue and bolts sound good. I'm aiming for six bolts (12 mm) and glue here and there.
Thanks for the feedback.