I'm going to open a wall, and I will place a metal beam on top of the wood studs.
But I'm wondering about two things:
1. If the interior wall is 7cm deep, should I choose the metal beam that is 7cm or one that is 6cm... 6cm gives me a better chance to encase it with wood and avoid the risk of it sticking out somewhere and becoming difficult to install...
2. Should I arrange for the metal beam to rest on small square metal plates instead of directly on the wood studs?
But I'm wondering about two things:
1. If the interior wall is 7cm deep, should I choose the metal beam that is 7cm or one that is 6cm... 6cm gives me a better chance to encase it with wood and avoid the risk of it sticking out somewhere and becoming difficult to install...
2. Should I arrange for the metal beam to rest on small square metal plates instead of directly on the wood studs?
Since you want to insert a beam, I interpret it as dealing with a load-bearing wall? In that case, I strongly recommend that you choose a beam that can handle the load first and foremost!
There is an engineer who has been here and calculated, 6cm wide can handle double what is needed, 7cm can handle 3 times more.
So, my questions remain.
So, my questions remain.
The metal beam directly against the wooden stud.. or a piece of metal in between? Does it make any difference I wonder - so the metal beam is prevented from cutting down into the wood - though maybe it won't do that anyway?
There is a maximum bearing pressure. But if you have 70mm studs with a 60mm beam above, you will certainly not exceed the maximum bearing pressure. These 70mm studs naturally have a buckling strength that falls below the maximum bearing pressure at 86% of the end surface.
Bearing pressure against the top of standing studs is not usually considered (as you normally load the entire or almost the entire available surface). However, the opposite is true, the pressure that such a stud exerts against a rafter or glulam beam above must be checked, so the surface area of the rafter that is to take the force is sufficiently large.
All should be read with a certain caveat that I might actually be wrong...
(The engineer does have a forum name that suggests he can tell if I'm off track...)
But I think you can safely choose a 60mm wide beam, if you already know that the beam itself is sufficiently strong.
Bearing pressure against the top of standing studs is not usually considered (as you normally load the entire or almost the entire available surface). However, the opposite is true, the pressure that such a stud exerts against a rafter or glulam beam above must be checked, so the surface area of the rafter that is to take the force is sufficiently large.
All should be read with a certain caveat that I might actually be wrong...
(The engineer does have a forum name that suggests he can tell if I'm off track...
)But I think you can safely choose a 60mm wide beam, if you already know that the beam itself is sufficiently strong.
There is far too little information in this thread to really dare to answer, but I'll take the risk.
If we assume that your designer has calculated a steel beam that can handle the load, deflection requirements, etc., and that they have also checked that your 45x70(?) timber stud can handle the load without buckling, then the contact pressure between the steel and the end grain is normally not a problem.
What I'm most curious about is what kind of support structure we're talking about - a 70mm internal wall of timber studs and panels is rarely load-bearing and, if so, usually only to support smaller loads, e.g., a gypsum ceiling or similar. Can you tell me a bit more about what it looks like? Are we perhaps talking about a solid plank wall? What is the span of the new beam? What is it supposed to carry? What type of steel beam is it?
/The Engineer
If we assume that your designer has calculated a steel beam that can handle the load, deflection requirements, etc., and that they have also checked that your 45x70(?) timber stud can handle the load without buckling, then the contact pressure between the steel and the end grain is normally not a problem.
What I'm most curious about is what kind of support structure we're talking about - a 70mm internal wall of timber studs and panels is rarely load-bearing and, if so, usually only to support smaller loads, e.g., a gypsum ceiling or similar. Can you tell me a bit more about what it looks like? Are we perhaps talking about a solid plank wall? What is the span of the new beam? What is it supposed to carry? What type of steel beam is it?
/The Engineer
Wooden beam: 90x70
Opening: 2.3 meters
Don't have the energy to write all the formulas but "R = 13 kN" "Md = 7 kNm"
According to a sketch, the width of the house is divided by 36 & 41 but I don't remember what the numbers stand for.
I-beam...
* IPE 140 s275 can handle 20 kNm; the metal seller today had an s355 that could handle more.
* IPE 120 s355 can handle 18 kNm.
The weight of the metal beam was comparable to one or two buckets of water.
The deflection factor was less than the wood... he mentioned the values, but I never wrote them down.
The wall is an interior wall between the kitchen and the living room at one gable.
Opening: 2.3 meters
Don't have the energy to write all the formulas but "R = 13 kN" "Md = 7 kNm"
According to a sketch, the width of the house is divided by 36 & 41 but I don't remember what the numbers stand for.
I-beam...
* IPE 140 s275 can handle 20 kNm; the metal seller today had an s355 that could handle more.
* IPE 120 s355 can handle 18 kNm.
The weight of the metal beam was comparable to one or two buckets of water.
The deflection factor was less than the wood... he mentioned the values, but I never wrote them down.
The wall is an interior wall between the kitchen and the living room at one gable.
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