Help - need opinion on fastening / support to hold up beam.

[Mats_Larson]

Hello forum.

I need your urgent help.

I have a house from -69 with a brick facade on the outside of aerated concrete blocks. In the late '80s, they expanded the house, including a 63 sqm terrace with a carport underneath. It is constructed with 4 HAB beams serving as support under the frame that the decking and railing rest on. On one side, these beams rest solidly on pillars, and on the other side, they rest on 95 x 95 angle irons bolted to the facade.



According to reports, the side with the angle irons settled during a party 15 years ago, which is why they supported it with a log. The liners in the window recess have given way a bit, and I guess that's the extent of the settlement. Not that it fell down, but still...



One might think about anchoring above a window... but...

Now we've bought the house and want to redo this as it doesn't feel safe, even though nothing has happened in recent years. The alternatives I'm considering for a solution are:

• Buy I-beams, cut up the asphalt, pour foundations, and create supports to transfer the load from the beams. It won't be an aesthetic solution as a beam will come out in front of a window, for example.
• Get 200x100 angles that are wider and create the same solution as now—just twice as heavily dimensioned with several fastenings. The basic solution has held for at least 25 years before...
• Lay a pressure-treated wood beam along the entire length and secure with substantial concrete anchors or similar.

...but now I'm here in the forum and want to see if anyone has thoughts on the solutions above or any other ideas?

I understand, of course, that there are significant downward forces with the terrace, railing, snow accumulation, or a big party on the terrace. It’s material + a couple of tons more to be supported on four points...

I assume we're talking about approximately 0.6 kN/m2 on decking and framing as well as the fence. This gives a total load of 37.8 kN plus snow or person load + furniture if 30 people were on the terrace. For simplicity, let's say it's an additional 50kN. In total, that's nearly 90kN to be distributed over four 6.3m long HAB beams. I'm not too worried about each beam carrying 22.5 over the span (3.57kN/m) - but what is required to make a vertical attachment to the wall? I can't calculate the load at all; I guess there's a moment factor to consider as well...

Is there any kind soul who can help me with this and offer some wise thought... please?

Thanks a lot!!

(Moved this thread from another forum since I couldn't find the right one)

 

[Peter787]

Hello forum.

I need your urgent help.

I have a house from '69 with a brick facade outside light concrete blocks. In the late 80s, the house was extended with a terrace of 63 square meters with a carport below. This is constructed with 4 HAB beams that act as supports under the framework on which the deck and railing rest. On one side, these beams rest steadily on pillars, and on the other side, they rest on 95 x 95 angle irons which are fastened with bolts to the facade.

[image]


Reportedly, the side with the angle irons settled during a party 15 years ago, after which it was supported with a log. The trims in the window recess have given a bit, and I guess that's the full extent of the settlement. It didn't fall down, but still...

[image]


Then one might have thoughts about making the attachment above a window....but....

Now we have bought the house and want to change this as it doesn't feel safe, even though nothing has happened in recent years. The alternatives I am considering are:

• Buy an I-beam, cut up the asphalt, pour a foundation and create props to shift the beams. It won't be an aesthetic solution as a beam will come out in front of a window, for example.
• Get 200x100 angles that are wider and create the same solution as now - just twice as heavily dimensioned with more fastenings. The fundamental solution has held for at least 25 years before...
• Place a pressure-treated wooden beam along the entire length and attach it with substantial concrete anchors or similar.

...but now I am here in the forum and want to check if anyone has thoughts on the solutions above or any other ideas?

I understand, of course, that there are significant downward forces with the terrace, railing, snow quantity, or a big party on the terrace. That's material + a couple of tons that need to be supported on four points...

I assume we're talking about approximately 0.6 kN/m2 on the deck and framework, as well as the railing. This gives a total load of 37.8 kN plus snow or personal load + furniture if 30 people stand on the terrace. For simplicity's sake, let's say that's another 50kN. In total, that's almost 90kN which needs to be distributed over 4 pieces of 6.3m long HAB beams. I'm not too worried about each beam being able to hold up 22.5 over the span (3.57kN/m) - but what is required to make a vertical fastening against the wall? I can't calculate the load at all, guessing there's a moment factor to consider as well...

Is there some kind soul who can help me with this and offer some wise thoughts... please?

Big thanks!!

(Moved this thread from another forum as I couldn't find the right one)

That the angle irons over the window are giving is not surprising since the window should not (take) any load at all. The brick rows over the window are certainly a prefabricated beam with reinforced bars cast in. That beam should only handle its own weight plus the weight of the bricks above, definitely not 10 kN extra load from the terrace. I would replace the beam over the window with a longer and stronger beam that can be anchored beside the window. If the brown field in the drawing to the left of the window is a door, I would do the same operation there as the wall construction is the same with a prefabricated brick beam over the door. Regarding the loads, don't forget the self-weight of the beams, your 4 HEA 200 beams weigh over a ton...