Fillet radius of W8X35 Wide Flange Beam

[tmech77]

Does anyone know what the real inside corner fillet radius is for a W8X35 wide flange beam?
I need to put some holes in the beam for bolts, washers and nuts, but do not want the washers to touch the radius.

 

[msquared48]

Well, the detailing section in my 1970 Manual of Steel Construction shows "k" = 1". This is measured from the outside of the flange to the farthest part of the radius where it hits the web.

So this would make the radius of the weld at 1/2" with the flange thickness being 1/2".

Mike McCann, PE, SE (WA)

 

[dhengr]

Tmech77:
Look in an older AISC Steel Design Manual, in the front, for W Shapes Dimensions for Detailing. The R you are looking for is about .4", for a W8x35, a W8 which is 8x8. Look at the (T, k, k₁, g₁, c & g) dimensions; they are 6&1/8", 1", 9/16", 2&1/4", 3/16", and 5&1/2" respectively. They might vary a little from mill to mill or with the conditions of their rolling mill at the time of rolling. They are dimensions in the region of the radius and the web/flg. area, and std. gage dimensions for bolting holes.

 

[wannabeSE]

AISC's Steel Construction Manual shows a 5 1/2" workable gage (typical bolt spacing in flange) for a W8x35. Google found a pdf that may be helpful:

http://www.mcsweeneysteel.com/Documents/AISCShapes.pdf.

These dimensions are not "real". Some of the dimensions might vary a little by manufacture. You will notice that some of the dimensions are shown as a fraction and decimal. The decimal dimensions are used for structural design (calculations) while the fractional are used for detailing.

 

[tmech77]

I really appreciate all the help from everyone. Have a great New Years.

 

[racookpe1978]

You can drill the holes with a counterbore large enough for the washer, and a close-fit hole for the bolt (or nut side side) itself would eliminate the assumed need for a washer.

 

[Tmoose]

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