i have a large accumulator tank (300l) which when full will be approx
350kg. what should i do to strengthen the floor where it will stand.

at the moment the floor is 7"x2" joists resting on bricks on the solum
about a metre apart (so its not really suspended). the joists are at
450mm centres. at the moment the tank (empty) is on 18" ply which
spans 3 joists.

wrote:
i have a large accumulator tank (300l) which when full will be approx
350kg. what should i do to strengthen the floor where it will stand.

at the moment the floor is 7"x2" joists resting on bricks on the solum

So in reality IIUC you have a 7x2" spanning 1m, with the added benefit
of extra cantilever resistance from the joist the other side of the
brick supports.

about a metre apart (so its not really suspended). the joists are at
450mm centres. at the moment the tank (empty) is on 18" ply which
spans 3 joists.

I would have thought that would be adequate as it is.

In fact, I just plugged the numbers into Superbeam for you....

Ignoring the cantilever, with that sized joist on that span, with the
3.5kN uniform load shared over three of them, you get a worst case
deflection of 0.15mm - so *way* inside.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
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| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 12 May, 15:33, John Rumm wrote:
wrote:
i have a large accumulator tank (300l) which when full will be approx
350kg. what should i do to strengthen the floor where it will stand.

at the moment the floor is 7"x2" joists resting on bricks on the solum

So in reality IIUC you have a 7x2" spanning 1m, with the added benefit
of extra cantilever resistance from the joist the other side of the
brick supports.

about a metre apart (so its not really suspended). the joists are at
450mm centres. at the moment the tank (empty) is on 18" ply which
spans 3 joists.

I would have thought that would be adequate as it is.

In fact, I just plugged the numbers into Superbeam for you....

Ignoring the cantilever, with that sized joist on that span, with the
3.5kN uniform load shared over three of them, you get a worst case
deflection of 0.15mm - so *way* inside.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

thanks ...

John Rumm wrote:
wrote:
i have a large accumulator tank (300l) which when full will be approx
350kg. what should i do to strengthen the floor where it will stand.

at the moment the floor is 7"x2" joists resting on bricks on the solum

So in reality IIUC you have a 7x2" spanning 1m, with the added benefit
of extra cantilever resistance from the joist the other side of the
brick supports.

about a metre apart (so its not really suspended). the joists are at
450mm centres. at the moment the tank (empty) is on 18" ply which
spans 3 joists.

I would have thought that would be adequate as it is.

In fact, I just plugged the numbers into Superbeam for you....

Ignoring the cantilever, with that sized joist on that span, with the
3.5kN uniform load shared over three of them, you get a worst case
deflection of 0.15mm - so *way* inside.

Not quite sure I understood the OP, but if we're talking about a 7x2
spanning 1m, but with effectively clamped ends as opposed to simple
supports, then the effective span is halved. Off the top of my head,
just by considering what shape the deformed beam adopts. I might sit
down and figure out the equations later (or just look it up...).

John Rumm wrote:



In fact, I just plugged the numbers into Superbeam for you....


Hello John

I saw your Google Sketchup project and like many others here was well
impressed.

What's Superbeam?

On Sat, 12 May 2007 19:22:38 +0100 Bypass wrote :
I saw your Google Sketchup project and like many others here was well
impressed.

What's Superbeam?

Software for basic steel and timber beam and column design

http://www.sda.co.uk/sbw1.htm

The original version was written in 1979 (for a Commodore PET) and has
been on sale commercially since 1989.

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk

Bypass wrote:

I saw your Google Sketchup project and like many others here was well
impressed.

What's Superbeam?

I was about to say Tony will be along shortly to tell you, but I see he
beat me to it!

Nice bit of software that will help you either design or cock up a set
of structural calcs really quickly. The outcome depending on the quality
of the information you give it!



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On Sat, 12 May 2007 21:45:16 +0100 John Rumm wrote :
Nice bit of software that will help you either design or cock up a set
of structural calcs really quickly. The outcome depending on the quality
of the information you give it!

The disclaimer on early versions said "If you don't know what you're doing,
this program will help you design dangerous structures even more quickly"
but I had to remove this on legal advice.

--
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk

Tony Bryer wrote:
On Sat, 12 May 2007 21:45:16 +0100 John Rumm wrote :
Nice bit of software that will help you either design or cock up a set
of structural calcs really quickly. The outcome depending on the quality
of the information you give it!

The disclaimer on early versions said "If you don't know what you're doing,
this program will help you design dangerous structures even more quickly"
but I had to remove this on legal advice.

That's the problem with legal advice, makes the world so much duller! ;-)

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/