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Climbing structure (bouldering mushroom)
Hello!
I am planning to build a free-standing climbing frame in my mother-in-law's garden. A festive project. I have two questions right now:
1. I'm thinking the base should be 3.6x3.6 m to fit with 3 plywood sheets in width and that the mushroom should be around 3.3 m high. How many footings do you think are needed? Is one in each corner enough, or should I add four more? I plan to use 2 pieces of 45x220 beams for the bearer. I'm planning to cast my own footings to frost-free depth. Recommended diameter for the cylinders?
2. A minimum of 19 mm thick plywood is needed. Which do you think would work best? It needs to be durable, made for outdoor use, and resistant to point load. Maybe it's cheaper and easier to glue two together? I see there is, for example, form plywood made of poplar, but unfortunately, I have no experience with this kind of thing. It will probably need around 20 sheets, so it would be nice if it doesn't cost too much...
I am planning to build a free-standing climbing frame in my mother-in-law's garden. A festive project. I have two questions right now:
1. I'm thinking the base should be 3.6x3.6 m to fit with 3 plywood sheets in width and that the mushroom should be around 3.3 m high. How many footings do you think are needed? Is one in each corner enough, or should I add four more? I plan to use 2 pieces of 45x220 beams for the bearer. I'm planning to cast my own footings to frost-free depth. Recommended diameter for the cylinders?
2. A minimum of 19 mm thick plywood is needed. Which do you think would work best? It needs to be durable, made for outdoor use, and resistant to point load. Maybe it's cheaper and easier to glue two together? I see there is, for example, form plywood made of poplar, but unfortunately, I have no experience with this kind of thing. It will probably need around 20 sheets, so it would be nice if it doesn't cost too much...
After reading up a bit, I've realized that it might be best to use 4 footings per side. So a total of 12.
K klevang said:Hi!
I'm planning to build a freestanding climbing frame in my mother-in-law’s garden. Fun project. I have two questions right now:
1. I thought that the base should be 3.6x3.6 m to fit 3 plywood boards in width and that the mushroom should be around 3.3 m high. How many footings do you think are needed? Is one in each corner enough, or should I add four more? I plan to use 2 pieces of 45x220 beams for the load-bearing beam. I'm thinking of casting my own footings to frost-free depth. Recommended diameter for the cylinders?
2. At least a 19 mm thick plywood is needed. Which do you think works best? It needs to be durable, made for outdoor use, and resistant to point load. Maybe cheaper and more convenient to glue two together? I see there is, for example, poplar form plywood, but unfortunately, I have no experience with this. There will probably be a need for about 20 boards, so it would be nice if it doesn't cost too much...
Formplyfa holds up well outdoors, if holes and edges are treated it's even better. Smooth and slippery, fairly easy to keep clean because of it, but it's not the cheapest sheet material.
I came across a large batch of used ones (110 pieces) for practically no money at all via a rental company. Had been used for casting once.
I came across a large batch of used ones (110 pieces) for practically no money at all via a rental company. Had been used for casting once.
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