HSS under baseplate to transfer shear
HSS under baseplate to transfer shear
(OP)
I am working on baseplate with very large moments and shear forces. The columns are W14s. I intend to use a heavier (wider) W14 as a baseplate to convert the moment to up/down force at each end of the baseplate. I think I can I resolve the moment this way but to transfer the shear I was planning on using a HSS welded to the baseplate.
Has anyone used a WF base plate with a welded HSS?
Thanks.
Has anyone used a WF base plate with a welded HSS?
Thanks.






RE: HSS under baseplate to transfer shear
If you are already using a W14 as a base plate, can't you weld an end plate on either side or use headed studs on the web to transfer the shear?
Where are you attaching the anchor bolts? Can you post a sketch your intended concept?
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
It made for a simple block-out in the foundation forming and made grouting the lug simpler as well.
RE: HSS under baseplate to transfer shear
Attached is what I am thinking of doing. Its still an ongoing thought, so I am not sure what I'll end up with eventually.
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
You probably also want stiffeners in the W14 base where the bolts go and I'd run those bolts through both flanges, not just the bottom flange.
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
I am showing stiffener plates near the anchor bolts and intend to move the top of the anchor bolt above the top flange so that its easier to connect.
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
-5^2 = -25
http://www.eng-tips.com/supportus.cfm
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
I don't like leveling or setting plates, I like to shim and plumb the column before grouting. I've seen some nasty gaps when a leveling plate is off level to the maximum allowable and the column base is off to the maximum allowable in the opposite direction.
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: HSS under baseplate to transfer shear
When done properly and set using the proper equipment the leveling plates can be set & grouted prior to the columns even showing up on site.
You can even place center/column line marks on the leveling plate ahead of time to match up with the columns.
If all is done properly/carefully, the column erection goes very quickly and with no where near the effort of grouting and shimming afterward.
RE: HSS under baseplate to transfer shear
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: HSS under baseplate to transfer shear
Looking at your detail, it seems like you may get a lot of rotation in this moment connection before you develop the design moment. I think it will behave more like a pin long before any significant moment is transferred. Are you having issues with traditional fixed bases?
RE: HSS under baseplate to transfer shear
RE: HSS under baseplate to transfer shear
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: HSS under baseplate to transfer shear
I can't say I've ever tested one to failure though.