From: Scott E Maxwell <smaxwell(--nospam--at)engin.umich.edu>
Date: Fri, 14 Apr 2000 19:56:49 -0400 (EDT)
I won't dwell too much on this since Harold already gave a much better
answer that I would have.
I will say that I tend to use embedded plates when dealing with concrete
walls. I tend to use the double angle connection to the embedded plate
that Harold mentioned. The fabricator/erector can have the beams with
the double angles loosely bolted to the beam with horizontal slotted
holes. Then the beam can be lowered in place (hopefully on an erection
angle if the engineer was smart/nice...I am usually neither <grin>) and
the angles "slid" out to the embedded plate and field welded.
I will use bearing plates when dealing with masonry walls.
On Fri, 14 Apr 2000, Sprague, Harold O. wrote:
> It is very difficult to have cast in anchor bolts positioned accurately.
> My preference is to:
> 1. Make the plate large to account for mislocated anchor bolts or to
> facilitate drilled in anchors. I keep the bolts clear of the beam flange.
> 2. Make the holes in the bearing plate the same size as if it were a
> base plate, and use plate washers.
> 3. The beam is then set on the bearing plate and field welded into
> In heavily reinforced or slip formed walls, I prefer eliminating the pocket
> and using an embed plate. If this option is used, make the embed plate
> large enough to accommodate mislocation of about 3 inches, and long enough
> to use an erection seat angle. Conventional shear tabs or clip angles can
> then be used that are welded to the embed plate and bolted to the beam. I
> prefer double clip angles bolted with long slots in the beam web to
> accommodate for length variations. By using double clip angles with
> standard holes, I avoid the need for a plate washer over the slot.
> Harold Sprague
> > -----Original Message-----
> > From: rlewis(--nospam--at)techteam.org [SMTP:rlewis(--nospam--at)techteam.org]
> > Sent: Friday, April 14, 2000 9:02 AM
> > To: seaint(--nospam--at)seaint.org
> > Subject: Beam Bearing Plate Bolts
> > I want to get some feedback of others experience with locating bolts on
> > beam
> > bearing plates. I have seen it done two ways. The first is to locate the
> > bolts on the beam gage line. The bearing plate is welded to the end of
> > the
> > beam. Since the bolt gage is narrow, the width of the beam bearing plate
> > and
> > the pocket in the concrete wall can be reduced. The second method is to
> > locate the bolts outside the width of the beam. The bearing plate is
> > welded
> > to the end of the beam. This would then make the beam bearing plate and
> > pocket about 6 inches wider then the beam.
> > Also, what is the preference of leaving the pocket out all together and
> > embedding a weld plate in the concrete wall and field welding a connection
> > to
> > the plate?
> > Rich
> > __________________________________________________
> > Richard Lewis, P.E.
> > Missionary TECH Team
> > rlewis(--nospam--at)techteam.org