- #1
RandomUser_87
- 3
- 1
Hi everyone,
I have attached a sketch which may help understand the question I have.
I have a hinged flap which hangs vertically (hinge at top). The flap weight is 10kN and it is 1.8m tall (uniform mass). At the bottom of the flap is a lifting eye.
2.5m away and 0.3m above height of the hinge is an anchor bolt, to which i will connect a lifting block. I then intend on lifting the flap with a single rope through this block.
The question I have is, the anchor bolt is rated to 40kN pull out force so I would like to see what
a) the pull out force will be on the anchor bolt when the flap is open 30deg
b) what the tension is in the rope at the same angle.
The calcs are just to give a ballpark figure for now and will be determined by a supplier later. I would just like an indication of what lifting gear will be required.
I have looked through previous questions and a lot seem to relate to a horizontal flap being lifted and i am struggling to get my head around things when rotated 90deg.I assume that tension is zero when the flap is just hanging down on its own and is a maximum when the flap is fully open (90deg) but I am struggling to make this work.
Thanks for you help.
I have attached a sketch which may help understand the question I have.
I have a hinged flap which hangs vertically (hinge at top). The flap weight is 10kN and it is 1.8m tall (uniform mass). At the bottom of the flap is a lifting eye.
2.5m away and 0.3m above height of the hinge is an anchor bolt, to which i will connect a lifting block. I then intend on lifting the flap with a single rope through this block.
The question I have is, the anchor bolt is rated to 40kN pull out force so I would like to see what
a) the pull out force will be on the anchor bolt when the flap is open 30deg
b) what the tension is in the rope at the same angle.
The calcs are just to give a ballpark figure for now and will be determined by a supplier later. I would just like an indication of what lifting gear will be required.
I have looked through previous questions and a lot seem to relate to a horizontal flap being lifted and i am struggling to get my head around things when rotated 90deg.I assume that tension is zero when the flap is just hanging down on its own and is a maximum when the flap is fully open (90deg) but I am struggling to make this work.
Thanks for you help.