If acquired lengthways, the load center is 1/2 the 6m, or 3m. The capacity of a forklift is based on a 24" load center, or 600mm. For every inch beyond the 24", the capacity shrinks by approx 100 pounds. You can do all the conversions (Imperial measurement to metric) but that is the basis of forklifts.Your load center would be well beyond the 24" (600mm), and be prepared to lose capacity. Therefore, the forklift would have to have a rated capacity, based on the 24", well beyond the 1400kg range.

Don't forget to deduct the weight of the attachment, as well. You may be better off picking it up the other way, and not knowing the width of the product, cannot help you there, but you may use the same means to determine the 'new' capacity.

Hope this helps.

Danny
Forklift Trainer