6 Apr
2001
6 Apr
'01
6:01 p.m.
I am looking for an online reference to help me calculate how
much live load (AKA VAXen) I can put on my living room floor.
The floor: 2x10's 2 foot on center, approximately 14 foot
span (guess, too lazy to measure just yet). 3/4" OSB on top,
carpet, 1/2" OSB (to keep the VAX from squishing into the
carpet)...
The VAX: 1100 lbs of true blue & white BIG IRON! minus
whatever I remove for hand transport.
Me: 300 lbs of Coca-Cola and Hostess fruit pies :)
Clint
PS I also want to replace a smallish steel IBeam with
a micro-lam, so steel numbers would help too...
6 Apr
6 Apr
6:55 p.m.
Only the seriuos collector would be asking this kind of thing :-)
Chad Fernandez
Michigan, USA
"Clint Wolff (VAX collector)" wrote:
I am looking for an online reference to help me calculate how
much live load (AKA VAXen) I can put on my living room floor.
The floor: 2x10's 2 foot on center, approximately 14 foot
span (guess, too lazy to measure just yet). 3/4" OSB on top,
carpet, 1/2" OSB (to keep the VAX from squishing into the
carpet)...
The VAX: 1100 lbs of true blue & white BIG IRON! minus
whatever I remove for hand transport.
Me: 300 lbs of Coca-Cola and Hostess fruit pies :)
Clint
PS I also want to replace a smallish steel IBeam with
a micro-lam, so steel numbers would help too...
7:08 p.m.
On Fri, 6 Apr 2001, Chad Fernandez wrote:
Only the seriuos collector would be asking this kind
of thing :-)
Chad Fernandez
Michigan, USA
"Clint Wolff (VAX collector)" wrote:
>
> I am looking for an online reference to help me calculate how
> much live load (AKA VAXen) I can put on my living room floor.
>
> The floor: 2x10's 2 foot on center, approximately 14 foot
> span (guess, too lazy to measure just yet). 3/4" OSB on top,
> carpet, 1/2" OSB (to keep the VAX from squishing into the
> carpet)...
Check out the allowable floor load in the Building Code and see how
many pounds/sq.-foot it is built for.
- don
The VAX: 1100
lbs of true blue & white BIG IRON! minus
whatever I remove for hand transport.
Me: 300 lbs of Coca-Cola and Hostess fruit pies :)
Clint
PS I also want to replace a smallish steel IBeam with
a micro-lam, so steel numbers would help too...
8:04 p.m.
New subject: load carrying capabilities of lumber/steel
This doesn't seem so OT to me, so I have removed OT from the subject.
Quoting "Clint Wolff (VAX collector)" <vaxman(a)qwest.net>et>:
I am looking for an online reference to help me
calculate how
much live load (AKA VAXen) I can put on my living room floor.
I have thought about this same subject to prepare for the arrival of my first
PDP-11 (boy am I excited!). This is how I came to a ballpark figure. The
floor of my future machine room consists of 2.25"-wide wooden slats, of varying
lengths (approx. 4'-6'), suspended above a crawlspace. I plan on putting a few
layers of plywood (anything better for this?) on top of the floor to help
spread the load evenly across the slats. Let's say I want to support 3 rack
cabinets. Well, that's a width of 21" * 3 = 63", which, in slats is
63" /
2.25" = 28 slats. If the system weighs 1500 lbs, then that's 1500 lbs / 28 <
54 lbs/slat. I think my slats can handle 54 lbs.
--
Jeffrey S. Sharp
jss(a)ou.edu
8:26 p.m.
New subject: load carrying capabilities of lumber/steel
www.efunda.com
(echo... echo... echo...)
All of the above strengths of materials and associated calcs are there in
a very nice format. In my acoustic design work, I use the site all the
time. Some really obscure and hard-to-find data and conversions are
listed.
Cheerz
John
7 Apr
7 Apr
1:42 p.m.
New subject: load carrying capabilities of lumber/steel
You forget the machine is mounted on casters, so you end
up with eight point loads of ~200 lbs each... Thin plywood
will help spread the load, but it will deflect also, spreading it
to an area much smaller than a 21" diameter circle. Multiple thin
layers will slide against each other during deflection and not and
much strength.
A single thick layer (1 inch?) would be best, but make sure the
joists supporting the floor can safely handle a 1500 lbs load.
Think how many joists will be under the machine. If the machine
is parallel to the joists, and directly above a single one you
will have problems. The best orientation is perpendicular to
the joists, and as close to whatever is supporting the joists
from below (beam or foundation wall).
clint
On Sat, 7 Apr 2001, Jeffrey S. Sharp wrote:
This doesn't seem so OT to me, so I have removed
OT from the subject.
Quoting "Clint Wolff (VAX collector)" <vaxman(a)qwest.net>et>:
I am looking for an online reference to help me
calculate how
much live load (AKA VAXen) I can put on my living room floor.
I have thought about this same subject to prepare for the arrival of my first
PDP-11 (boy am I excited!). This is how I came to a ballpark figure. The
floor of my future machine room consists of 2.25"-wide wooden slats, of varying
lengths (approx. 4'-6'), suspended above a crawlspace. I plan on putting a few
layers of plywood (anything better for this?) on top of the floor to help
spread the load evenly across the slats. Let's say I want to support 3 rack
cabinets. Well, that's a width of 21" * 3 = 63", which, in slats is
63" /
2.25" = 28 slats. If the system weighs 1500 lbs, then that's 1500 lbs / 28 <
54 lbs/slat. I think my slats can handle 54 lbs.
--
Jeffrey S. Sharp
jss(a)ou.edu
5:04 a.m.
16" spacing would be better than 24, but most houses are built to support
100 # per square foot. What are the dimensions of the vax? If it is 3x8
you're looking at a capacity of about 2400#.
On Fri, 6 Apr 2001, Clint Wolff (VAX collector) wrote:
I am looking for an online reference to help me calculate how
much live load (AKA VAXen) I can put on my living room floor.
The floor: 2x10's 2 foot on center, approximately 14 foot
span (guess, too lazy to measure just yet). 3/4" OSB on top,
carpet, 1/2" OSB (to keep the VAX from squishing into the
carpet)...
The VAX: 1100 lbs of true blue & white BIG IRON! minus
whatever I remove for hand transport.
Me: 300 lbs of Coca-Cola and Hostess fruit pies :)
Clint
PS I also want to replace a smallish steel IBeam with
a micro-lam, so steel numbers would help too...
M. K. Peirce
Rhode Island Computer Museum, Inc.
Shady Lea, Rhode Island
"Casta est quam nemo rogavit."
- Ovid
7:48 a.m.
I have some recent experience with putting something fairly massive
onto a residential floor. As part of the kitchen remodel we're
installing an Aga cooker, which is just under 1300 pounds spread
evenly over roughly a 5x3 foot area -- that "evenly" bit is important;
there are no point loads as opposed to what you might expect from the
feet on bays (or even the rails resting directly on the floor).
According to the manufacturer, the floor loading is "usually" acceptable
if the Aga is installed immediately adjacent to a load bearing wall.
In our case it's installed against _two_ foundation sills, thanks to the
weird seismic codes we have (which, in fact, more or less assure that
homes will be torn apart in a major event, but that's another story) the
unsupported span for the beams is only about ten feet.
This is a recent construction home with beams on 16" centers, with the
back end of the load essentially resting on a foundation sill -- and
the engineers freaked. It was necessary to install additional piers and
an additional beam parallel to the front of the cooker before they'd
issue our permits.
--
Chris Kennedy
chris(a)mainecoon.com
http://www.mainecoon.com
PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97
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days inactive
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8 comments
7 participants
participants (7)
-
at258＠osfn.org -
chris＠mainecoon.com -
donm＠cts.com -
fernande＠internet1.net -
jpl15＠panix.com -
jss＠ou.edu -
vaxman＠qwest.net