Hi all,
Not sure where this belongs, so I will start it here.
I wish to hang a ninja slackline (picture 50mm wide ratchet strap from two points with a bunch of hanging things on it) from a dirty big tree to the corner of my house.
The required strength is roughly 4.5kn to 6kn dynamic stress, so somewhere around the 600kgs WWL.
I was contemplating putting 100mm steel plates on the brick and using that, however I've been advised against that, with some occurrences of the brick work being pulled out. Pass.
House and tree photo:
The house is a 1970s era brick veneer home, the bricks are hollow core.
On the right you can see a vent, and through that I can access three rafters heading up into the house.
Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅
Closer shot looking up into the vent. The horizontal beams you can see easily terminate the the gyprock. The ones in the shadow to the left are the angled beams running up into the roof
Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅
Inside shot. Top beam is the rafter, 100mm x 45mm:
Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅
Show showing angle and roughly where I can access it:
Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅
My question is, can I attach to these beams in a fashion that would give me the required strength, remembering this will be a sideways pull back to towards the tree? Ideally I'd love to come down 200mm / 300mm so if I had to put something steel down from one / two / three rafters to a single eyebolt, that would be fine. Alternatively if I could eyebolt up at the rafter level and bridal down to a single point, that would also suffice.
If the answer is no, then it's 100mm steel tube and concrete into the ground time.
Cheers,
Dan