gussetplate: how to weld
gussetplate: how to weld
(OP)
Good Day
I would like to ask something about the welding of gussetplates
please see attached photo
does a gussetplate needs to be weld from both sides or only from one side?
is it correct to interrupt the welding joint for 80mm sections? this means if the gussetplate is for exaplae 500mm lpong that i have only a welding section of 80mm in front and 80mm in the back
regards
lolobau
I would like to ask something about the welding of gussetplates
please see attached photo
does a gussetplate needs to be weld from both sides or only from one side?
is it correct to interrupt the welding joint for 80mm sections? this means if the gussetplate is for exaplae 500mm lpong that i have only a welding section of 80mm in front and 80mm in the back
regards
lolobau






RE: gussetplate: how to weld
RE: gussetplate: how to weld
http://files.engineering.com/getfile.aspx?folder=c...
RE: gussetplate: how to weld
In your photos - this does not look like a very significant structural assembly so I would probably not worry about it too much.
RE: gussetplate: how to weld
RE: gussetplate: how to weld
RE: gussetplate: how to weld
RE: gussetplate: how to weld
RE: gussetplate: how to weld
The gusset plate in the photo is not shaped to permit a balanced weld on the diagonal. It should be shaped to permit more weld on the heel and a lesser amount on the toe.
BA
RE: gussetplate: how to weld
???? In truss applications, they do nothing for the flexibility of the connection since the connections are considered to be in tension or compression. In column applications, they increase the strength of the connection to resist bending...therefore making the connection more rigid and transferring stresses away from the basic column to baseplate weld. Gusset plates reduce the flexibility of such connections.
RE: gussetplate: how to weld
I would like to ask something BA
just to make sure
what do you mean with "gusset is not shaped to permit a balanced weld"
I attach a new photo with some differend cases A, B, C, D and differend arrow colurs so that we can discuss it better
RE: gussetplate: how to weld
"A“ red, violet, green are cross wildings and weaken the section? But yellow and blue is correct?
“B” there should be actually a welding in red and violet?
“C” blue and violet is perfect but yellow and red wrong?
“D” yellow, green white should be rather provided and blue and red left out?
RE: gussetplate: how to weld
Welds are "balanced" when their centroid is aligned with the centroid of the angle. They cannot be completely balanced because one toe is not welded, but they can be nearly balanced. Suppose you have calculated that you need a total length of weld of 200mm for an equal leg angle. A completely balanced weld would be 50mm at each toe and 100mm at the heel. Because one toe cannot be welded, a nearly balanced weld would be 150mm at the heel and 50mm at the connected toe.
In the case of an unsymmetrical truss (not something I normally specify) you must attempt to place the weld metal in a similar fashion. I will use another post to comment on your photos.
BA
RE: gussetplate: how to weld
Photos B and C
1. Move gusset plate to the other side of the connected leg of the top chord and end vertical, terminating it at the dashed chalk lines shown on Photo B.
2. Do not trim leg of diagonal. Terminate angle in a 90 degree cut.
3. Reduce height and increase length of gusset plate as required to accommodate a balanced weld for diagonal. The weld along the chalk line is already balanced so no need to do anything more.
4. Yellow arrow Photo B...butt weld is okay but probably not necessary. Blue arrow Photo B...delete. Red arrow...use 1/4 Lw fillet weld. On heel, use 3/4 Lw (no arrow shown).
5. On Photo C, violet and blue arrows are okay but will be on opposite side of angle leg. Yellow and red arrows...do not weld here as it weakens the member.
Comments would be similar for Photos A and D.
BA
RE: gussetplate: how to weld
thank you really realyl a lot for your help. Now you opend my eyes for all the details.
To be honest I did never considder it with the balanced weld on the hell and the toe
I see on the photo "B" how you distribute it with the wleding lenght of 1/4 outside and 3/4 inside the angle.
Make sense somehow but do the guys really do it this way on the site?
Does it have a negative influence if the outside welding which was supposed to be 1/4 will be 4/4?
see attached graphics. Is this now correct?
http://files.engineering.com/getfile.aspx?folder=7...
http://files.engineering.com/getfile.aspx?folder=d...
RE: gussetplate: how to weld
Sketch FF2 with gusset outside looks okay as drawn.
Sketch GG2 with gusset inside indicates the gusset plate running to the face of the outstanding leg of the angle on the top and right. This won't work because the plate will run into the curved angle fillet. Keep the gusset and weld clear of the fillet. If the angle is large enough, terminate the gusset plate at the c.g. of the angle and use Lw on that line, otherwise move the gusset to the outside and follow Sketch FF2.
BA
RE: gussetplate: how to weld
You get a little bit more inter-member eccentricity to deal doing this, but your fab is much easier.
I wouldn't do this with something heavily loaded, because the plates would start getting ridiculous.
I know you're now working with sketches where you're not welding the right angled members directly together. I'll just reinforce that by pointing out that you're not really trying to pass forces between those two members. They're at close to right angles and don't interact significantly. If there's no significant force transfer there, why bother with a connection that's a significant fraction of the capacity of the member.
RE: gussetplate: how to weld
To TLHS: yes this is what I am trying to show in GG2 that the diagonal member is placed, mirrored to the other side of the gusset. The angel is approx 20 degree you are right and this makes the gusset plate very long.
lolobau
RE: gussetplate: how to weld
BA