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  1. #1
    Join Date
    Oct 2006
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    Newcastle
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    Default Supporting a trussed roof

    My OCD has kicked in again and I need to lift my Lathe (Hafco AL-320), so I can remove its stand for some modification.
    I believe its approx. 280 Kg gross weight, going by the handbook.
    Given room restraints, I need to lift it from the Hardwood truss above, just enough to remove the stand and pack, while I work on the stand.
    I have now idea about whats required to strengthen the truss etc
    Truss is 7.2mtr from wall frame (Hardwood) to wall frame, and is supported @ 3.6mtr , by studded wall (pine).

    Enlighten me gentlemen.
    Hafco AL320G Lathe
    Toolex RF31 Mill/Drill
    Saber Bandsaw

  2. #2
    Join Date
    Jul 2016
    Location
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    35
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    Default

    I would enlighten you into finding any other way to do it, even make a pair of A frames or take the lathe outside and do the work with an engine crane or hired gantry

    Sent from my SM-G973F using Tapatalk

  3. #3
    Join Date
    Mar 2014
    Location
    South of Adelaide
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    1,225

    Default

    Quote Originally Posted by caskwarrior View Post
    I would enlighten you into finding any other way to do it, even make a pair of A frames or take the lathe outside and do the work with an engine crane or hired gantry

    Sent from my SM-G973F using Tapatalk
    I agree

  4. #4
    Join Date
    Aug 2011
    Location
    Melbourne
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    4,779

    Default

    What cask said.

    Too many unknowns and potential injury and expense if something goes wrong.

    At nearly 300kg, it's alot of weight as a single point load on a roof beam that was not designed to hold that extra weight.

    At a guess, at best you will get away with cracked plaster.

    Do a forum search for things like rollers or jack lifting attachment etc. Quite a few options for lifting and moving machinery.

    Simon

    Sent from my SM-G970F using Tapatalk
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  5. #5
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    May 2020
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    Willowbank QLD
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    Default

    Let me put it another way. Would you and two of your mates get up in the roof cavity and stand side by side on the truss? If yes you have your answer.

    If not consider two A frame ladders with a beam between them as a gantry. A lot of ladders will hold 150KG.

    To put a few things into perspective. A solar hot water system full of water will weigh more than a lathe but spread over a few trusses.
    Is it possible to support it by two roof trusses. This is similar to two large blokes working in the roof side by side.

    Steve

  6. #6
    Join Date
    Dec 2013
    Age
    56
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    Default

    Can we get a picture of the roof trusses, a 4x2 hardwood spread across roof trusses would help a lot as Reidy said.

    You could always put a prop under the truss close as well, but a picture would help a lot.

    Sent from my 5007U using Tapatalk
    Using Tapatalk

  7. #7
    Join Date
    Mar 2011
    Location
    Southern Flinders Ranges
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    1,536

    Default

    Acrows and some angle iron….

  8. #8
    Join Date
    Oct 2006
    Location
    Newcastle
    Posts
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    Default

    thanks gents, some good ideas

    lifting point would be between two trusses. I will try and get picture, but it will be hard to get a good view of the area.
    Hafco AL320G Lathe
    Toolex RF31 Mill/Drill
    Saber Bandsaw

  9. #9
    Join Date
    Nov 2007
    Location
    melbourne australia
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    3,228

    Default

    Quote Originally Posted by Dave J View Post
    You could always put a prop under the truss close as well, but a picture would help a lot.
    That's what I'd be looking at doing. One either side, unless there's a wall against one side. And for good measure, stiffen the bottom chord of the truss with a length of 90x45 MGP10 attached with staggered nails.
    Chris

  10. #10
    Join Date
    Oct 2006
    Location
    Newcastle
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    Default

    couple of pics of my trusses and lathe I need to lift




    Hafco AL320G Lathe
    Toolex RF31 Mill/Drill
    Saber Bandsaw

  11. #11
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
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    Default

    Hi Oldhack,

    Thanks for the pictures !

    Those trusses only look like 2" X 4" ! I would take the advice to support them whilst you do the lifting. A couple of lengths of 4" square used as props temporarily wedged under the truss would support the weight easily.
    Best Regards:
    Baron J.

  12. #12
    Join Date
    Oct 2006
    Location
    Newcastle
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    124

    Default

    Quote Originally Posted by BaronJ View Post
    Hi Oldhack,

    Thanks for the pictures !

    Those trusses only look like 2" X 4" ! I would take the advice to support them whilst you do the lifting. A couple of lengths of 4" square used as props temporarily wedged under the truss would support the weight easily.

    thanks for the reply BaronJ.
    I'll try it with props under the bottom truss cords, as mentioned previously the lift point is between tresses, so I need something strong enough between the trusses. would 75 x 75 x 8 angle be sufficient ?

    Kicking myself I didn't add cross braces to the lathe stand when I made them now. But I'm having vibration issues above 1000rpm., I'm hoping adding braces will be the answer. I seem to recall reading conveyor belt under the feet helps too.
    Hafco AL320G Lathe
    Toolex RF31 Mill/Drill
    Saber Bandsaw

  13. #13
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
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    Default

    Quote Originally Posted by Oldhack View Post
    thanks for the reply BaronJ.
    I'll try it with props under the bottom truss cords, as mentioned previously the lift point is between tresses, so I need something strong enough between the trusses. would 75 x 75 x 8 angle be sufficient ?
    It should be, however it depends upon how long it is between supports. A good way to estimate the strain on your angle, would be to support it on a couple of bricks on the floor spaced the same as the trusses and stand on the middle, or the point that you are going to attach the load and see how much it flexes.

    Kicking myself I didn't add cross braces to the lathe stand when I made them now. But I'm having vibration issues above 1000rpm., I'm hoping adding braces will be the answer. I seem to recall reading conveyor belt under the feet helps too.
    That was originally my suggestion It certainly helps, particularly if the concrete floor hasn't been finished smooth. Vibration wise, I would check the drive belt for any damage and the pulleys for any debris build up. I had a vibration issue with a table saw once, it turned out to be a fair size wedge of resin bonded wood built up on the drive pulley.
    Best Regards:
    Baron J.

  14. #14
    Join Date
    Oct 2006
    Location
    Newcastle
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    Default

    Quote Originally Posted by BaronJ View Post
    It should be, however it depends upon how long it is between supports. A good way to estimate the strain on your angle, would be to support it on a couple of bricks on the floor spaced the same as the trusses and stand on the middle, or the point that you are going to attach the load and see how much it flexes.



    That was originally my suggestion It certainly helps, particularly if the concrete floor hasn't been finished smooth. Vibration wise, I would check the drive belt for any damage and the pulleys for any debris build up. I had a vibration issue with a table saw once, it turned out to be a fair size wedge of resin bonded wood built up on the drive pulley.
    good suggestion re the bricks

    Truss span is 1.2 mtr
    Hafco AL320G Lathe
    Toolex RF31 Mill/Drill
    Saber Bandsaw

  15. #15
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    Mar 2011
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    Southern Flinders Ranges
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    Default

    Two pieces of angle under the timber, a sufficiently sized piece of RHS long side vertical on top, put an Acrow under each piece of angle and clamp the whole lot together. RHS is just a bit kinder on the slings. If you already have a chunk of thick angle use it in an L not an inverted V and clamp a chunk of wood to it to remove the small edge the slings are pulling up on. Put a piece of rubber or soft timber under the bottom of the Acrow.

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