We are planning to build a sturdier playhouse for our children, but we are having difficulty finding information on the dimensions of timber for the construction to build a stable and safe structure.
Currently, the plan is to dig down four posts in a square with 2.5 meters between them and then mount a 90x90 pillar of 3.6m on each. The rest of the construction consists of 145x45 joists according to the image below. For the floor, decking will be mounted, and the walls will be paneling. The roof will likely be a simple roofing felt.
Center-to-center between the floor joists is about 85cm.
Will this construction be okay, or is the distance between the posts too long? Is it better to go up to 170x45, or would that be overkill?
Currently, the plan is to dig down four posts in a square with 2.5 meters between them and then mount a 90x90 pillar of 3.6m on each. The rest of the construction consists of 145x45 joists according to the image below. For the floor, decking will be mounted, and the walls will be paneling. The roof will likely be a simple roofing felt.
Center-to-center between the floor joists is about 85cm.
Will this construction be okay, or is the distance between the posts too long? Is it better to go up to 170x45, or would that be overkill?
45x145 is too weak. It becomes wobbly, quite unpleasant up in the air. Go up to at least 45x170. Keep in mind that unprotected wood has worse structural integrity in the long run. The biggest problem is stabilizing laterally. Diagonals/wire crosses or braces are needed. For flooring with c/c 85 cm, you need to use 34x145 mm decking lumber.