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Building a Free-Standing 6x6 Lumber Frame Outdoor Ninja Course. Would It Strong Enough?
I’m building a free-standing rectangular frame using 6x6 pressure-treated lumber, forming an 18 ft x 4 ft footprint with 8 vertical posts (spaced 6 ft and 4 ft apart). The structure is connected at both the top and bottom using 6x6 horizontal beams and heavy-duty 3-way and 4-way steel pocket brackets that lock each joint. The whole thing should weigh more than 1500 lbs just in lumbar and won't be anchored to the ground. I'm aiming for it to be strong enough that an adult can safely hang from any corner without tipping, twisting, or racking. Do the brackets and weight alone provide enough rigidity? I'm trying to avoid digging 8 holes each 4 feet deep and filling that with concrete. The price to buy few more 6x6x12 IN GROUND rated pressure treated lumber and few more brackets will not be that much more than the price of concrete. The lumbar will all be Menard critical structure pressure treated lumber that's rated for IN GROUND use. The structure will basically be 4x8x18 feet. On the long side I'm adding 2x12x18 beams that will have holds on the outside and monkey bars in the inside. There will be a pull up bar on one of the short sides. Is this crazy? submitted by /u/AspiringPhtographer [link] [comments]
I’m building a free-standing rectangular frame using 6x6 pressure-treated lumber, forming an 18 ft x 4 ft footprint with 8 vertical posts (spaced 6 ft and 4 ft apart). The structure is connected at both the top and bottom using 6x6 horizontal beams and heavy-duty 3-way and 4-way steel pocket brackets that lock each joint.
The whole thing should weigh more than 1500 lbs just in lumbar and won't be anchored to the ground. I'm aiming for it to be strong enough that an adult can safely hang from any corner without tipping, twisting, or racking.
Do the brackets and weight alone provide enough rigidity?
I'm trying to avoid digging 8 holes each 4 feet deep and filling that with concrete. The price to buy few more 6x6x12 IN GROUND rated pressure treated lumber and few more brackets will not be that much more than the price of concrete.
The lumbar will all be Menard critical structure pressure treated lumber that's rated for IN GROUND use.
The structure will basically be 4x8x18 feet.
On the long side I'm adding 2x12x18 beams that will have holds on the outside and monkey bars in the inside.
There will be a pull up bar on one of the short sides.
Is this crazy?
[link] [comments]
