Hello!
We are in the process of renovating our stable and are going to move an existing load-bearing beam.
The new load-bearing beam (90x405 glulam beam) will be placed in the loft, and the plan is to hang the ceiling joists on it.
The beam, which is divided into sections, will be supported by 90x90 glulam posts.
I am looking for a suitable bracket to hang the joists on the load-bearing beam. I have considered a custom solution with angle brackets and threaded rods but am unsure about the sizing of these. (Angle brackets that are nailed into the beam on both sides, and then the joists are hung on threaded rods that are drilled through the joists and angle brackets)
We are in the process of renovating our stable and are going to move an existing load-bearing beam.
The new load-bearing beam (90x405 glulam beam) will be placed in the loft, and the plan is to hang the ceiling joists on it.
The beam, which is divided into sections, will be supported by 90x90 glulam posts.
I am looking for a suitable bracket to hang the joists on the load-bearing beam. I have considered a custom solution with angle brackets and threaded rods but am unsure about the sizing of these. (Angle brackets that are nailed into the beam on both sides, and then the joists are hung on threaded rods that are drilled through the joists and angle brackets)
The only proper way is probably to hang them with through bolts and support plates. You should calculate the actual load for each joint. You could also consider a combination of bolts and brackets.
Was a bit hesitant to drill through the beam (a total of 600mm) and insert threaded rod, but I think I'll go for it anyway. I'm a bit unsure, though, about what size washer is required to avoid punching. 40x40 seems to be the largest "standard" dimension, but I feel it might be a bit flimsy. The force in the joint is about 12 KN.
Vertical holes through beams affect their flexural rigidity significantly less than holes in other directions, which can be good to know. In addition to washers, you need load distribution steel plates. These should be as wide as the respective beam. Considering that the surface pressure should be at most 3 MPa (= 3 N/mm2) and that the tensile force is 12 kN, the area of each load distribution steel should be at least 4000 mm2, preferably more.
Wow.. that's a lotJ justusandersson said:
Four thousand square millimeters is not that much, e.g., 50x80 mm.
Thanks for the help!
I will talk to the smith tomorrow and decide whether to use a continuous threaded rod or one on each side. I will oversize the plates properly since the floor beams are 200x200, so there is space.
I will talk to the smith tomorrow and decide whether to use a continuous threaded rod or one on each side. I will oversize the plates properly since the floor beams are 200x200, so there is space.
Haha thought a bit too quickly thereJ justusandersson said:
The tiles should be really thick, preferably 8 mm.