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Thread: My New Shed project
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2nd Feb 2016, 10:44 PM #1Golden Member
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My New Shed project
My plan is to start a new thread and document the building of my new workshop. This is a significant job but hopefully will be completed in the next year or so.
It will be 12m x 24m and custom built to house some of my bigger precision machines. Individual foundations will be built for the jig borer and slideway grinder.
The main issue will be the 5 tonne travelling overhead gantry that will also be installed. This has required a major upgrade to the plans and most of the local shed builders are hiding if they see me coming. Finally came to an arrangement with one that I will do the foundations/cement floor/posts/gantry running beam/install the gantry and he will do the rest (basically roof and walls). No one wants the responsibility of installing the crane without fully certified plans and structural engineering oversight. Given the cost of that is close to 50% of the shed projected cost and it will be on a farm and I will be the only one working there I have decided to construct it myself. Always liked a challenge!!
So the last 6-12 months have been about cleaning up the site, collecting information, getting advice, chasing up suitable materials and tools and now it is time to start.
Will try and post something every couple of weeks and document each aspect of the build.
Here are some photos of the site and some steel (310 UC 158)that I will use for the shed posts.
More soon
Cheers
Mark
2016-01-01 17.50.04.jpg2016-02-02 14.56.02.jpg2016-02-02 14.56.35.jpg
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2nd Feb 2016, 11:11 PM #2Most Valued Member
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Hi Mark
Looking forward to watching the build. That's going to be one pretty special shed.
Stuart
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2nd Feb 2016, 11:46 PM #3Diamond Member
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That looks really good Mark, I take it that the gantry will hang off those posts, not just the shed itself.
I once had the experience of the local company who had taken over local council building DAs, site inspections etc from the council, wanted me to have a set of plans re certified by a structural engineer for a shed I put in a tender for. The plans had been drawn up in the 1970s by a long established Hobart engineering firm who probably had the capacity to build Sydney Harbour Bridge, but in the case of the shed in question, had a design using structural steel profiles, channel, angle and UB sections for a skillion shed 18mx11mx4.8 to the high end of the roof. It was a 4 bay shed with a mezzanine on one end in 1 bay. I said "you are looking at the plans, drawn up by P&S", and she replied that they would have certainly complied with all regs when drawn, but that was 30+years ago. I said that the bloody shed is framed in structural steel, not 'c' section, and she grunted and asked if I had a demolition permit to dismantle it, so I concluded that all she was after was as much of my meagre pickings as she could get from my hip pocket. Sadly my tender was not successful, so nothing came of it but as I too live in a rural area with just over 5 Ha, I pretty well decided that when the time comes, I will probably just build my shed, or re-errect a second hand one, without troubling the council or any of their hangers on either. I will document with photos and notes any parts not readily examined later, (like reo in the slab for example) and hope for the best.
I like the idea that you are installing a gantry crane, with the machines that you have, and the likely size of some of the workpieces you might need to handle, a gantry will be a really useful addition. Best of luck with your build,
RT
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3rd Feb 2016, 09:44 AM #4
I have been following bcbloc02's barn conversion and he has done all of the work himself , very impressed.
I doubt that the nanny state here would be as equally impressed .
I have found that because the council inspectors cant picture how it will look or be done the do everything possible to stop you.
Michael
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3rd Feb 2016, 10:04 AM #5Pink 10EE owner
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Depends where you are I guess. Where I am we are free to build whatever shed I like with no official oversight provided it is more then 200m from a road and for rural use only.
In reality you can do what you like, build a shed house etc and the council will probably not worry unless they are notified it is happening or receive a complaint.
Shed building is not rocket science, gantry cranes a bit different thoughGold, the colour of choice for the discerning person.
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3rd Feb 2016, 10:07 AM #6
Hi Mark
I've been following your other thread about designing for the gantry crane and am impressed by your resourcefulness.
Can I just mention that the loads on a crane running beam (and the support columns) are complex, which is why typical gantry crane posts and running girders are so heavy.
In essence, design needs to allow for
1. the load being lifted being off set from directly under the crane winch -- this will tend to pull the gantry (and running beam and posts) inwards on one side and push it outwards on on the other. It will also try to twist the running beam.
2. starting and stopping the gantry tends to put largish horizontal forces on the running beam that get transferred to the shed posts where the beam attaches -- these forces are trying to bend the posts in line with the long axis of the shed.
3. moving the crane traveler along the gantry imposes push and pull forces on the running beam that are at 90 degrees to the direction of the beam,
4. the gantry itself is rarely square to the running beam, more typically it moves along its rails crabwise.
For these and other reasons, the steel supporting a crane is much heavier than would otherwise be the case, and the normal deflection criteria (deflection to span length) is much more stringent.
With your second hand steel, please check for defects (eg ripples) in the flanges and be aware any Chinese steel that failed Aust specification testing has likely ended up in the scrap yard looking like more than useable steel.
good luck with the shed build
and please don't have your crane drop on youregards from Canmore
ian
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3rd Feb 2016, 01:34 PM #7
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7th Feb 2016, 01:48 PM #8
Hi Mark,
Interesting project.
My 2c here is to watch the power lines during construction, you have a service line that appears to go through the construction site (could be wrong on that?) and a set of low voltage mains running parallel with the shed, and also a high voltage Single Wire Earth Return (SWER) line above that. Minimum clearances from those lines is mandated at state level so I cant give you an exact distance for closest approach. That also varies depending on the qualifications of machinery operators and their safety observer, the voltage on the lines and the integrity of the insulation (for low voltage).
My site was almost exactly the same electrical layout, minus the SWER line. It can make playing with cranes during construction difficult, not supposed to lift over live wires nor encroach clearance limits. Likewise actually playing with metallic roof and wall cladding. I got round the issues by building part of the shed and then relocating the service to the new shed with new underground sub mains to the house. I do have all the authorisations for this, however I am also quite particular about it, having an incident on your own site when you are supposed to be able to police this stuff for the general public goes way beyond merely embarrassing.
If you have not thought of this already, perhaps speak to an electrician about relocating the service to the shed onto a property pole and running new mains to the existing structure? Getting the service out of the way early will make life much easier and is something that you will have to do anyway (at least from the first photo?)
I'm looking forward to seeing how the shed progresses.
Cheers
The Beryl BlokeEquipmenter.... Projects I own
Lathes - Sherline 4410 CNC
Mills - Deckel FP2LB, Hardinge TM-UM, Sherline 2000 CNC.
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7th Feb 2016, 04:41 PM #9Pink 10EE owner
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19th Feb 2016, 08:12 PM #10Golden Member
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So got a spare day this week. Quick compaction of the ground then hurdles erected and slab strung out. Used a laser level to level the top of the hurdle beam with the top of the slab height. So easy compared to using the old theodolite. Rather big fall from one end to the other of 600mm! Will make digging out the foundations for the jig borer and slideway grinder a bit easier though.
Now waiting for the excavator to dig some foundation holes and some trenching for water pipes. Wondering if 75t of road base and blue metal dust will be enough.
Might have a line on some 24" x 7" crane runway I-beam not far from home. Just need to talk him into selling it to me at a reasonable price. Fingers are crossed.
Still need to take the truck to Sydney for reo, 1 inch plate for the base plates, insulation paneling and some other odds and ends.
2016-02-03 17.52.21.jpg2016-02-04 15.14.06.jpg2016-02-04 15.14.31.jpg
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21st Feb 2016, 06:04 PM #11
The construction of the "little sheds" I work in is massively oversized to support the two cranes(only 25t SWL), the uprights at a guess are two 36x12" x1.5" at the thin edge IB's with a 1" plate lapping each side joining them... uprights every 12' I reckon the rail support beams would be 36" tall at least.
And this still wobbles
All the steel is from Sheffield England!(yeah its been there a while)
Would it be easier to build a portable motorised gantry? Then it could be wheeled outside too....................................................................
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10th Mar 2016, 07:37 PM #12Golden Member
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So work goes on!
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Lines strung up and measured/squared for the slab. Also piers and machine foundations marked out for the excavator.
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10th Mar 2016, 07:59 PM #13Golden Member
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Didn't take long with an excavator but a long time with a crow bar
2016-02-29 17.46.15.jpg A trench for waterline
2016-03-01 18.16.23.jpg Piers are 900mm x 900mm x 1200mm deep. Will pack the bottom of the holes with cracker dust to gice a nice hard base.
2016-03-01 18.15.41.jpg Foundation for the slideway grinder. Again the base will be packed with blue metal dust. Aim for slab of around 450mm.
2016-03-01 18.21.18.jpg
2016-03-01 18.21.34.jpg
2016-03-02 17.55.23.jpg2016-03-02 17.56.01.jpg2016-03-02 17.56.05 HDR.jpg Just to remind myself why I need a new shed.
Away with work again so no work for the next few weeks. Will be building reo cages for the piers and foundations when I get back.
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10th Mar 2016, 10:34 PM #14Pink 10EE owner
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With the picture of the crowbar and shovel here I was thinking you dug all that by hand.
Gold, the colour of choice for the discerning person.
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10th Mar 2016, 10:53 PM #15Golden Member
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I did do some along the wall of the shed which the excavator couldn't really do. Still need to finish the base of the pier holes because the excavator couldn't really finish them flat. If I had to do it all by hand I would never finish. Ended up being about 15m3 soil dug out with foundation holes for the jig borer,slideway grinder and the big stationary engine base. This is turning into a very BIG project.
Also managed to buy some steel for the crane runways.... 24" x 7" I beam with a heavy duty 12"channel welded on top. Should be big enough!!
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