![]() ![]() 4 * Kickboard Long Support 50x50x100 - optional.A couple of parts are optional because I either didn't fit that part or I found a better way of solving the problem. These are the parts I used in the construction. The hardware list is certainly close but I might have missed the odd bolt or washer - I buy hardware like nuts and bolts in large packs as it's cheaper so I don't tend to count everyone I use. Step 3: Tools and MaterialsĪs I had to make up a single large order for the timber I have a good record of what I used. I would guess the safe working load is actually somewhere over 300kg. On top of that the average joist spacing is quite a bit less than 450mm, the deck is 18mm hardwood ply rather than chipboard and my supplier sent me C24 timber rather than C16. Since my designed span is significantly less than 1.82m I was more than happy that it was strong enough. The surface area of the platform is 1.5m^2 which gives a maximum safe working load of 1.5*153=230kg assuming it's built to the regulations. My platform had the following dimensions: For these dimensions the maximum span is 1.82m (approx 6'). These are standard construction dimensions and so the maximum span can be looked up in a table. The platform would be built from C16 dry graded lumber with a dimension of 47x97mm (approximately 2x4") with 450mm centres (approx 18"). My aim was to make the platform at least this strong. Going by the BS6399-1 building regulations (superseded but I could find figures from this version) a wooden floor should be designed to support 153kg per square meter. I have more detail on my main site but to summarize the calculations worked out like this: The working platform is built like a floor in a house and so it seems reasonable that the calculations and tables used for floors would also work for my platform. The platform was my main concern as this was the first time I'd every built a structure that spanned a reasonable opening. Just looking at the design I was fairly sure that what I intended to build would be strong enough but I wanted to see some figures backing that thought up. ![]() Bargains can be picked up second hand, normally on taller towers, but then you have the problem of transporting it and getting spares. Trade quality towers with a working height of 3.7m typically start around £700 new. DIY towers are good for what they are designed for but they aren't sturdy or stable enough for building work.
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