Building and Construction - Steel RSJ Question

Author

Steel RSJ Question

Mike

2006-03-21, 12:21 pm

My wife and I own a property which we have recently let to someone.
The tenant wishes to open the property as a bar and so they have begun
refurbishments. The work includes gutting the entire ground floor and
part of this work involves the installation of an RSJ which extends
right across the width of the building. This is to support a centre
load bearing wall in a three story property.

The RSJ has been fitted and it is HUGE, it is approx 18 inches in
height. However, it does not sit on top of the left and right legs as
one might expect. Instead, the RSJ is fitted between the legs via
plates which are welded to the legs and the RSJ and then bolted
together. There are eight bolts per side, sixteen bolts in all.

How can an entire building be supported by sixteen bolts? How can this
be right?

--

Robert Allison

2006-03-21, 1:21 pm

Mike wrote:
> My wife and I own a property which we have recently let to someone.
> The tenant wishes to open the property as a bar and so they have begun
> refurbishments. The work includes gutting the entire ground floor and
> part of this work involves the installation of an RSJ which extends
> right across the width of the building. This is to support a centre
> load bearing wall in a three story property.
>
> The RSJ has been fitted and it is HUGE, it is approx 18 inches in
> height. However, it does not sit on top of the left and right legs as
> one might expect. Instead, the RSJ is fitted between the legs via
> plates which are welded to the legs and the RSJ and then bolted
> together. There are eight bolts per side, sixteen bolts in all.
>
> How can an entire building be supported by sixteen bolts? How can this
> be right?

If the engineer said it would work that way, then it will work
that way. Bolts have an extremely high shear rating. I have
worked on many industrial jobs with much heavier loads where
bolts are supporting large structural members, so I wouldn't
worry too much.

Check the plans, make sure everything is installed correctly,
and then don't worry about it.

--
Robert Allison
Rimshot, Inc.
Georgetown, TX

Budweiser

2006-03-26, 7:21 pm

"Robert Allison" <robert272@spamless.net> wrote in message
news:1VVTf.2202$4N1.1366@trnddc06...
> Mike wrote:
>
> If the engineer said it would work that way, then it will work that way.
> Bolts have an extremely high shear rating. I have worked on many
> industrial jobs with much heavier loads where bolts are supporting large
> structural members, so I wouldn't worry too much.
>
> Check the plans, make sure everything is installed correctly, and then
> don't worry about it.
>
>
> --
> Robert Allison Rimshot, Inc.
> Georgetown, TX

If the design has been certified by a structural engineer,dont worry.
Bolts will hold more of a load than the beam will do---just ensure the RSJ
has been installed exactly as the designer intended (dry packing to the
upper face etc)

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