Go to the "Technical Arena" discussion forum & you will get a some good advice on trying to calculate a capacity by your self - it can be like running straight into a "buzz saw". There are only "guesstimators" out there - with qualifying statemetns liek " for actual capacity ratings contact teh manufacturer". Like we male gendered folks often hear "all you men are alike" & we know that ain't true & not all lift trucks are a like.

Using basic calculations from MFG and other websites will always get you into the ballpark but if you really need to know you need to run it through the manufacturer. If your local dealer wont provide you with the Factory's Calculations get a different dealer.

There are a lot of different factors which allow one model of truck to "Maintain" capacity better then another. For example a 3 wheel electric sit down truck will typically maintain capacity for attachments, and taller masts better than a 4 Wheel electric truck. The 3 wheel truck normally has a wider stance, and lower center of gravity because the battery is closer to the floor allowing it to maintain capacity better than its 4 wheel counterpart. The the online and available formulas dont necessarily take these differences into account and therefore should only be used to ESTIMATE.

Simple 7000kg

no problem
maybe a forklift isnt the answer but you could look into other types of difting devices like a gantry crane on tracks or girder crane

Thanks..might have to avoid these products for now..too awkward and heavy for a small set up

thats the job u walk in on and have to tell them that additional counterweight in the form of day laborers is not osha approved lol

Well. either way, a 3000lb, three wheel, battery forklift is not in the cards for this job. LOL

in regards to the original post
if your product is 1400 kilos thats roughly 3100 lbs
and is that right 6 meters long? that is large lol
so the load center,3 meters, converted to inches is about 118"
when using the osha calculation it looks like u would need a machine in the 11000 kilo to 15 kilo cap range
11000 kilo= 22000 lbs (about i know its not accurate lol)
22000 * 24 / 118 = 4475 lbs capcity which is about 2030 kilos not much grey area for the attatchment of that size
a 15000 kilo cap machine would have a reduced capacity of 2768 kilos (6102 lbs)
sounds like an expensive investment

the only machine that seems to be most accurate is the 3000 lb cap with a 30" load center and the 5k with a 36" lc
but as u increased load center on this small machine the lbds subtracted per inch would decrease making your estimate high (leaving a nice saftey cusion lol)

a 5k machine comes out to:
subtract 138lbs per inch at a 36" center and 104 lbs per inch at 48 inches (2500 reduced cap)
so thats "close" but not entirely accurate
(subtract 3333 from 5k =1667 less lbs. divide that by load center diff 1667lbs / 12" = 138 lbs per in)
but as u go up in capacity that "guesstamation" would be less accurate and possibly dangerous

i serviced a factory with 11000 lbd mitsus with 60" capacity paper roll clamps
the clamps could handle a load center of 30" and added about 4" to that from the face of the forks
that gave them a load cap of about 7765 lbs (actual #s were prob a lil different but this is close)
that makes a difference of 323 lbs per inch at a 34" load center
at 36 it would be 306 per inch less
and 229lbs per inch at 48 (if it had forks lol)
with your estimation the 11000 lbd machine would have a new capacity of 10000 lbs ( at 34") more than 2000 lbs more than the actual reduced cap which would be very dangerous

and now u know how to do the calculation you wont have to guess lol

I believe my previous post is accurate. According to your google search, the fourth listing, re Oregon OSHA's publication Section A-5.3, the load center works out to be 1"=100 pounds.

dbl post oops

google "calculating load centers powered industrial trucks" and u will find many pdfs on how to calculate this along with all other stability questions

basically if you have a 5000lb machine (us) u multiply 5000 by 24 (inch load ctr)
that equals 120000 inch lbs
then if you have a load with say a 36 inch load center
you would divide 120000 (inchlbs) by 36
that would give you a reduced capacity of 3333 lbs

InventoryOps, I would too. The other thing is that the dealers automatically jump to a 1 tonne haevier machine..without any engineering justification!!!

I would like to see if there some engineers on the forum that could provide some more information on this. Over the years I have run into a few simple formulas for calculating the lift truck capacity but have discounted them because it seemed to me that it must be more complicated than that. In the past when I had to press my dealer to give me a capacity for a non-standard sized load, he would kick it back to the manufacturer.

This is an important issue because it is sort of the ghost in the closet of forklift training in that we explain center of gravity and the load capacity of the truck relative to the placard but don't explain how to calculate a load size other than the one on the placard. I have never gotten an answer in the past that I felt confident in.