Lighting column masts.

  • 11 Jan 2015 20:27
    Reply # 3188496 on 3186713

    This is only the same scenario as with a hybrid alloy tube/wood topmast, so I wouldn't be concerned about it, so long as the design of the joint is good, and the joint is as high up as possible (ie, if there is excess length, trim it from the top). I'd bond the join with toughened epoxy, I'd prefer not to rivet.

    If the tube diameter is chosen well, for sufficient strength and stiffness, there's no need for a sleeve, and in any case, it's difficult to find tubes that mate well. My mast has an internal sleeve that was made by cutting a lengthwise sliver out of a piece of tube, compressing it and hauling it in - I'm not at all sure that it does a great deal of good.

  • 11 Jan 2015 19:13
    Reply # 3188448 on 3186713
    Deleted user


    The sources I have researched can only anodize if the mast is made as 2 piece and then joined.  Is the anodizing worth living with a 2 piece mast.  MY Nic 35 has a 2 piece mast, but that is fairly common with the BR.  I might be a bit nervous with the JR

    Your thoughts?

  • 11 Jan 2015 19:09
    Reply # 3188445 on 3186713
    Deleted user

    PJR talks about adding a sleeve (inner or outer) at the partners to spread out the bending force.  Sounds sensible to me. What do others think

  • 09 Jan 2015 20:21
    Reply # 3186960 on 3186713

    I have some items of powder coated tubework aboard - they wouldn't fit into the anodising bath. They've done pretty well over 15 years, but where I've drilled through, and where the coating has been damaged, there is some minor corrosion bubbling up through. Damage to the coating is bound to occur on a JR mast - I'd stick with anodising. Scuffed anodising shows as a darker spot, but that's as far as it goes. 

  • 09 Jan 2015 15:27
    Message # 3186713


    I've just received quotations for lamp posts for use as unstayed masts. Needless to say, the cable entry hole and access door would not be cut. The options for finish are: 

    10m 222x5 base, conical column, brushed finish:  £995.29; clear anodised:  £1,033.51 or powder coating: £1,075.82

    The appearance of a white powder coating appeals, and I believe this may be durable enough to withstand the wear usual in a junk rig, but I'm not sure anodising might not be the best option.

    Any views?

    Incidentally, the company providing these quotes is the Aluminium Lighting Company, Port Talbot, Wales.

    Cheers, Asmat

    Last modified: 09 Jan 2015 19:02 | Anonymous member
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