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how to make a magnetic cranecan somebody answer me very urgently?

how to make a magnetic cranecan somebody answer me very urgently?

Answer:

that is an electromagnet made of soft or wrought iron[which i'm not sure of] and i acts as electromagnet ie., acts as magnet on passing electricity .It is magnetized and made to attract the thing which has to be lifted and after the completion of work it is de-magnetized .after the completion of work
I agree with mrdav 76.
this is normal, especially when the posts dry in place, or under pressureAs for repair, unless they're structural members, there's really no need, though replacement is probably the only wayAs for prevention of future cracking, get a good water-sealing compound (like Thompson's water sealerThis helps prevent the swelling and shrinking of temperature and moisture changes.
If you can save the vinyl.drill some small holes (1/8) at the top and bottom of each side of the post(2 per side, centered).the wood needs air flowing around to to prevent it from sweatingSealing the PT with an oil primer will help too.don't forget to hit the top really well, because the end-grain is the door to moisture.
Mr Dav is right, it is a chemical reaction between the copper of the pressure treated wood and the aluminumHousewrap or thin roofing felt is the way to goWash your hands after messing with pressure treated wood, it also has pesticides in it.

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