I needed a freight elevator for my attic, mostly for apples.I took a truck bed crane off of alibaba and sunk some M16 bolts into the concrete. I estimate the worst-case pullout loading at 3.5 kN, on a 450 kg load, before adding a 2x safety margin. The datasheet for the bonding compound said that an M16 bolt would handle it at 125mm depth. I fucked up the install and only got it about 115mm deep before it set. Should I be worried?Also, r8 my grouting job. Only the second time I've worked with concrete.
>>2993362You could make it 100x stronger/less likely to fail by attaching a flat bar going from the top to some random spot towards the rear, then putting a concrete anchor there. Or 2-3x stronger by doing one from right under the "rotating" joint.
>>2993364The joint is actually rotating. It's a conical array of roller bearings. But I see what you're getting at. I would need two or three, to cover the entire arc of rotation.
>>2993362Why not use the old barn standard hoist? A bigass wooden beam than hangs out above the opening and has a hoist on it? I've even seen ones that have a rail so you can pull in whatever you've hoisted up. This also keeps the hoist out of the weather when needed.Or you could do the same but with a metal I-beam. That way you could use a hoist that is on a carriage and slide it in and out as needed. Simpler but you'll need to source an I-beam. Some fancy pants fucker even made one where the whole fucking beam can be stowed out of the way.Then, who could forget, the third style of hoist. I have seen them but have no idea what their proper name is. I just call them a 'hoist outhouse'. They were popular on grain mills. Pull up the gain and, when not in use, drop a duce on passers by.
>>2993362Davit hoist would be better for lifting a long distance.
>>2993401The ceiling and rafters are very high up, and such a job would have been much more expensive, I think. I only had the door done, the rest I did myself. Total budget was about 3k, including the crane, door, and tools. The door was also positioned to avoid cutting any existing beams. I think if we had placed a hoist in the rafters that wouldn't have been possible.
>>2993362Are you hoisting pianos by chance?
>>2993443Lol no, mostly taking old junk out of the garage that was too heavy to carry up the stairs. We have a walk-in freezer that we're going to use for apples in the near future, which we will be collecting in 300 kg palox containers.The overhang is just barely more than 60 cm, which is a half-length of a standard pallet. Therefore, a properly centered pallet load should go up without scraping the wall.In a couple years we may get a forklift, which will do the job a lot better, but we need a kludge solution now to free up the second garage.
>>2993436I recently picked up a new old stock Chisholm-Moore Cyclone 1-ton chain hoist for about $67. That has a capacity of a bit over 900 kg. A 10 foot/3 meter length of used I-beam can be had for a a couple of hundred bucks. You can buy a decent trolley for a few hundred bucks, a shitty Chinese one from harbor Freight for $80 or, if you have the ability to cut metal, make one yourself for something between the two. From there it is just a matter of hoisting the beam into the barn without a hoist and installing it.
>>2993362Looks pretty gud OP. What size winch are you gonna run on that? >>2993445Oh yeah get a forklift, they are amazing for all kinds of stuff. >>2993464Noice. I was just looking at a couple oldies/goodies I have stashed away yesterday. Also have some A frame ends I got for free that I just need to clean up and weld a plate to to bolt a beam across them and I'll have another A-frame gantry. Already have a couple others I got for dirt cheap. I don't use them much because I have loaders, forklifts, and telehandlers, that get used often, but sometimes they shine for certain applications. Really want to get pic rel overhead traveling gantry put up in the shop someday...
>>2993362unless you try to lift more than it is rated at it should be fine. ya dun gud skippy.
