Originally Posted by Leapy
Yes, as long as you take out the word "point". I'm sure you're not suggesting that the axle can accommodate an infinite number of 1100kg point loads?
There are three elements to the mechanics of this discussion ... the boat, the steel fabrication (the "trailer chassis" you made yourself) and the axle that you rescued from a caravan.
Think it through ... you're quite right to say that the boat is not a point load on the "trailer" - as long as by "trailer" you mean the "trailer chassis" - but, the "trailer chassis" is most definitely a point load on the axle (well, two points loads actually). Not that that matters anyhow ... 1100kg capacity means 1100kg capacity regardless of how it's distributed or how you phrase it.
Its all about load distribution...If you dont understand how it works, as an example take a 2 axle 18 tonne lorry (I have an HGV2 licence so this stuff is my bread and butter)...Its U/W is typically about 10 tonnes and its maximum gross weight is 18 tonnes, so it has a maximum payload of 8 tonnes.
Note that even when fully loaded, at no point is there ever an 18 tonne load on either axle, despite the lorry actually weighing 18 tonnes when fully loaded, because the load is distributed, not a point load.
Typically the 18 tonne deadweight is split into an axle point load of about 40% on the front axle and 60% on the rear axle. Note that neither axle is able is take an 18 tonne point load directly though.
On a single axle trailer with a distributed load the maximum gross weight can also exceed the capacity of the axle, because the load becomes split between the weight on the hitch (the nose or tongue weight) and the axle. If your driving a 4x4 your towhitch can probably accomodate a 100kg nose weight comfortably so lets assume your towing a fully loaded single axle trailer with a 100kg nose weight and an 1100kg capacity axle...100+1100 gives a trailer with a maximum gross weight of 1200kg, more than the capacity of the axle!
I admit its not a large amount of weight difference but it is a difference.