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Recent content by ADT

  1. ADT

    Welding High Tensile Light-Gauge Sections

    Yes, Hokie, as you say, under 1.2mm is G500 or G550. 1.6mm and above is G450. My mistake. To define large, I should have mentioned that these buildings are all "Standard Designs" using the light gauge material. So "large" for these is perhaps up to 20m span and 7.5m frame centres. Obviously not...
  2. ADT

    Welding High Tensile Light-Gauge Sections

    Bill, yes the practice is common, even ubiquitous around here. Even if the job has bolted connections you almost always have end plates for the bolting, and these plates, (eg. 8 or 10mm plate) are welded to the galv light gauge section at knee and apex. I'm trying to get a handle on the best...
  3. ADT

    Welding High Tensile Light-Gauge Sections

    Many thanks all for your comments. I'll make contact with Buildscope in OZ and see what I can get from them, (sometimes an extended process!). I'll contact Lincoln and see if they'll deal with a bloke from down under. Regarding designing economically, the buildings I'm referring to are medium...
  4. ADT

    Welding High Tensile Light-Gauge Sections

    I frequently see steel-framed buildings using light-gauge (viz. purlin type section) frames, having welded connections at the maximum moment points, ie. knee (column to rafter) and apex of a hipped roof. It's my understanding that the heat of welding generally speaking destroys the high tensile...
  5. ADT

    Screw Identification

    This seems to be one of those "am I the only guy who doesn't know this" questions. I've tried quite hard to locate an explanation behind the 'code' which identifies screws, in particular TEKS types, those self drilling ones. For example a teks screw can be described as 14-20x22 plus a few other...
  6. ADT

    stacked stone retaining wall

    If this is all about building a stacked stone wall then a batter of 1:6 will be fine, ie. 6 vertical and 1 horizontal. Consequently I'm not sure the coefficient of friction is going to come into the problem, since you now have a "gravity wall", ie. it's leaning backwards and as long as...
  7. ADT

    Precast Panel Deflection

    Yes, what is this P/C band supporting? Is it purely a cosmetic device? The support of glass, as mentioned, can be a real issue, but this will depend on the jointing and physical construction of such frames. Check the actual frame joint methods, eg. rubber inserts, silicone with little structural...
  8. ADT

    Depth beyond anchor embedment

    All the concrete anchor suppliers, eg. Ramset, will provide the answers you request. The exact figure will alter depending on the size of anchor (diameter x length) and the physical size of the "piece" doing the connecting; edge distance and a few other things. Ask your supplier...
  9. ADT

    Vapor Barrier

    The main issue here is that concrete is porous to moisture. Do you need the warehouse to be moisture-proof? That is, when anything is left on the floor, do you want it to remain dry. The answer by most clients will be &quot;... of course I want the << complete the expletive >> floor to be...
  10. ADT

    structural masonry

    Look at anything by J Morton of Brick Development Association, UK. He's produced a number of very well detailed papers on Structural Masonry and it's design and detailing. Recommended! BS5628 is the UK standard, in 3 parts. Also &quot;Handbook to BS5628&quot; by Heseltine & Moore. AS3700 is...
  11. ADT

    Steel Beam supporting 5 Ton Crane

    I agree with the others re. the rail/wheel thing. Also if your beam was under-designed it wouldn't make noises it would deflect, deform etc. But the main point to make is that you must get up there while the crane is operating and find out what is making this noise. Take photographs, check...
  12. ADT

    Biaxial bending on a spread footing?

    What you ask will vary substantially for a clayey reactive soil as compared to a stable and granular soil. If you want to address the total question you will need to examine the seasonal and long term soil movement since this interacts (a critical point this) with the footing forces. You can...
  13. ADT

    why the steel bars in concrete are round why not diamond shape of rect

    Square-twist bar used to be used in European and Australasian areas because it was easy to obtain as Mild Steel square bar which was then Cold Worked by the action of twisting. This gave a helical shape longitudinally which was also very good for concrete bond reasons. Usually only the small bar...
  14. ADT

    Damp Rising in Old Buildings

    As I understand it you've treated the INSIDES ONLY of the walls, which is fine. I would add that the mortar joints throughout might need replacement in order to prevent some continuing damp damage and in order to give you a better final result than leaving the old lime mortar in place, would...
  15. ADT

    Torsional elastic modulus

    Hariharan &amp; Riz are right! Anthony Tugwell Project Director &amp; Consulting Engineer - just relocated to Australia
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