wrote:
On 30 Apr, 08:33, "The Medway Handyman"
wrote:
John Rumm wrote:
sm_jamieson wrote:
I will need to hang several purlins from a masonry wall at an angle.
Inserting masonry/timber hangers into the wall and getting all
purlins in line would be very tricky. Hence I will put a ledger
plate on the angle with expanding bolts and fix the purlins using
jiffy hangers. Each will have to support aboud 100kg. Purlins are
225mm x 75mm. Will long legged jiffy hangers be sufficient for this ?
Even the tiny hangers are good for 1.6kN typically. I think the long
leg ones are well over 6kN, so I can't see your 1kN troubling any of
them.
Been using the mini ones for decking joists for a few years, no problems. I
do screw then in rather than nail them though.

I'm always inclined to use screws, but wondered if the BCO would
question this. Certainly more pull-out resitance that twist shank
nails, but apparently screws are hardened and less ductile than nails,
which can actually give them worse properties under stress.

Indeed - the sheradised nails designed for this purpose are more than
adequate. There is little if any tension load on them (its all in
shear), and the lack of case hardening is an advantage - making the
fixing tougher overall. (not only that - they are much cheaper and you
get through thousands of them).

--
Cheers,

John.

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