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- To: <seaint(--nospam--at)seaint.org>
- Subject: Re: lintel
- From: "vlad" <simina(--nospam--at)idirect.com>
- Date: Sun, 26 Jan 2003 02:46:30 -0500
I have a 12" thick concrete block wall and a 8'-0" opening. For a
bending moment of 8.9 kNm (there is a floor and wall above and then the roof)
2-L102x76x6.4 do the job, but I chose 2-L102x102x6.4 to avoid mistakenly
reversal of the angle when installing the lintel.
Thank you for the help and prompt response.
----- Original Message -----
Sent: Saturday, January 25, 2003
Subject: Re: lintel
What I do in this situation is
cut the mortar joint out (or cut a groove in the masonry units if the new
doorway doesn't coincide with a mortar joint), extend this cut about 8" past
each side of the doorway, insert an angle in the saw cut and grout it in
place. Do this from both sides of the wall before you remove the doorway
masonry. After removing the doorway masonry weld some quarter inch plate
tabs between the angles.
I'll leave the sizing of the
angles up to you. If the masonry pattern is running bond I would use a
triangular load increasing at 45 degrees from each end towards the centre of
the span and ignore any roof loads which are above this load block. If
it's stacked bond I would use the full weight of the wall above plus all of
the superimposed roof load.
I don't think I'd use less than
L 3x3. If you have a really large doorway (say a 16' truck doorway, for
instance) you might have to use channels instead of angles or add a steel beam
underneath and perhaps add columns to support this lintel but that's beyond
the magnitude of information provided.
H. Daryl Richardson
Can anyone help with ideas on how to insert a new steel lintel in an
existing concrete block wall in order to create a new door opening?The
lintel supports the wall above and 400 plf of floor load.TIA Vlad