Distinctive engineering connection details

By The Helpful Engineer / On / In Technical & Discussion

I came across this impressive bolt arrangement for a column to beam connection in an indoor swimming pool. I liked that the structural engineer went to the trouble of designing a circular bolting arrangement for the beam to column connection as part of the glulam timber frames. While it is more aesthetically pleasing than the typical rectangular bolt arrangement, it is also more difficult to design. It is great to note in these difficult economic times, when design fees are being squeezed, that structural engineers are still making the time and effort to design visually distinctive details. More photographs below:

Column to beam bolted connection glulam timber
Column base connection glulam timber

4 thoughts on “Distinctive engineering connection details

  1. I disagree, it is in actual fact mush easier to design a circular connection than it is a traditional grid because if I am correct, I will assume that the Engineer has assumed the centroid of the bolt group as being the centre of rotation, in which case each of the bolts around the circumference all have an equal perpendicular distance about the point of rotation, where as a traditional grid connection would have numerous bolts of different distances. I know because I did a 12-16 bolt group some years ago and found it extremely difficult to design in timber, in particular when the timber capacity is different when loaded perpendicular and parallel to the grain and each bolt capacity must first be calculated in relation to its angle to the point of rotation as well as the distance.

    1. Thanks Hon, good point. I haven’t designed a circular bolt arrangement myself so I will take your word for it.

  2. Have you looked at the TEC shear rings and shear plates. They raise the bolt loading by 5X to 10X? These have been used for many years for structural work. I have used them with combination of steel plates. Works well.

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