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  1. richard4556

    Risk associated with making a hole in a wall

    I've contacted a local structural engineer. See what he can do for me. Best course of action.
  2. richard4556

    Risk associated with making a hole in a wall

    Ok, understood about the need for a qualified person to look at this. Thanks. If it was not for the fact that the hole I am seeking to create is close to the edge of a window opening I would feel confident in creating the hole. I may put a hole in at point #2. That should present no real risk...
  3. richard4556

    Risk associated with making a hole in a wall

    Assuming that I'll be taking an acceptable risk if I employ two props, both sitting on the wall that is below what is the window opening - there arises the question of the pressure to be exerted by the props on the lintel. Of course, what is needed is some pressure that effectively relieves some...
  4. richard4556

    Risk associated with making a hole in a wall

    Hi. Possibly coming to a conclusion here. I'm not a structural engineer, however I have made a drawing and I wish to provide some analysis. In the drawing below we see 15 positions where a notch or a hole is made in the wall below the lintel. The notch or hole is 250mm by 85mm, starting with...
  5. richard4556

    Risk associated with making a hole in a wall

    Hi. Can I check understanding here: The opening in the back wall (the wall), for the door and the window, with a lintel above it - is already there. And the new hole I am seeking to make is a rectangular one of size 220mm in the horizontal by 85mm in the vertical - just to to the right of the...
  6. richard4556

    Risk associated with making a hole in a wall

    Another way of describing this is as follows: A wall of 340mm thickness is 1706Cm long, 5181mm high. Near the middle of that wall there is a rectangular opening that is 1800mm long in the horizontal and 2050mm in the vertical. Atop which is a lintel. If you cut a rectangular notch into that...
  7. richard4556

    Risk associated with making a hole in a wall

    Hi. I'm curious about whether there is any unacceptable risk associated with making a rectangular hole in an external house wall. In the picture, the wall is a no fines wall. That is, its made off pebble aggregates (20mm dimmer) coated in cement. There are many voids. It's a wall developed by...
  8. richard4556

    What is End of Cycle (EOC)? : It's use with automated dispensing systems

    Aaah, I think I've got it for a simple batch operation involving one valve. Start of dispense cycle is when the valve controller receives the first INIT. If on the 9th init, during valve activation, there is another INIT, the valve controller cancels the deposit cycle, which in fact closes the...
  9. richard4556

    What is End of Cycle (EOC)? : It's use with automated dispensing systems

    Hi. I'm rather new to automation. I'm looking at the operating manual for an auger valve controller (ValveMate 7194 by Nordson). But, I'm unsure about EOC. My understanding is that when an INIT signal is received, the controller actuates the dispensing valve according to the program that has...
  10. richard4556

    Guidance Notes wrt King Post Retaing Wall

    The thing is, here we are in 2016, and it looks like no-one has bothered to publish to the world a guidance note on erecting a king post retaining wall above say 1m, using RR sleepers. Now, if that is true, that is telling us something. That the material selection is amiss. I did a search of...
  11. richard4556

    Guidance Notes wrt King Post Retaing Wall

    OK. I'm now getting more and more convinced that it's not good trying to put up a king post fence as a retaining wall. As an inexpensive concept it isn't apparantly working. I'll probably put up a commercially made segmented retaining wall, or a regular brick wall, based on BRE 27 "Building...
  12. richard4556

    Guidance Notes wrt King Post Retaing Wall

    I have a feeling that if a contractor put in posts for this king post wall, the steel beams would be sunk no less than 2 meters in the ground. And if a cantilever was made a contractor would weld onto the bottom a beam say at least 1 meter normal to the post.
  13. richard4556

    Guidance Notes wrt King Post Retaing Wall

    I am not a structural engineer, but, these are my thoughts: Drawings A and B are not to scale. A shows how to build a small retaining wall given certain assumptions, one of which is the wall is no more than 1m high. It's "designed" or drawn up by a brick manufacturer, in a series of "Get it...
  14. richard4556

    Guidance Notes wrt King Post Retaing Wall

    Hi. I've uploaded a drawing to make things clearer. If I want to build a small domestic clay brick retaining wall, in which the design represents the meeting of an obligation to put up a adequate wall, in terms of safety, then I can download a guide note from a brick manufacturer. In the UK...
  15. richard4556

    Guidance Notes wrt King Post Retaing Wall

    Thanks for the snippit of information. I wonder if ADMIN could place this thread in the right spot. (Earth Retention Engineering forum.)
  16. richard4556

    Guidance Notes wrt King Post Retaing Wall

    In the UK if you wish to put up a retaining wall under 2m high, as long as it is not near a highway or next to building foundations, you can - without planning permission or advising building control. What DIYers do when building a retaining brick wall, is take note of construction guidance...
  17. richard4556

    Techinical Specifications of Hand Shears

    Hi. Can someone please explain the technical specifications mentioned in the attachment? Thank you. The tool is a hand shear. I understand 2 of the 5 only. First shows thickness that can be cut, and fourth shows length of cut. But, don't understand 2nd, 3rd and 5th...
  18. richard4556

    Phase and metal hardening

    Good links. I think I got it now. The main issue is diffusion. In particulate hardening, one metal cannot diffuse, or entirely diffuse into the other, and has to participate out when the alloy is cooled. So, although it might start out as a single phase alloy when in a liquid state, which is...
  19. richard4556

    Phase and metal hardening

    I'm newbie on this BTW. In the phase diagram as per the link, when the volume of beta in the composition is above a certain point, when cooling, the point is reached when the solid alloy contains alpha and beta. Both alpha and beta I presume are different types of crystallization. Are we saying...
  20. richard4556

    Phase and metal hardening

    Hi. This is not coursework, I'm trying to understand the subject. I read that one method of hardening a metal is through strengthening with a second phase. I'm not entirely sure I understand the phrase "strengthening with a second phase". Can the phrase "strengthening with a second phase" be...

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