We've been asked to look at a suspended concrete floor in an existing building (built around 1980) to advise on load capacity. There are no existing drawings available.
Out of interest, how would this process occur? If the client does happen to find some drawings, I could analyze it no problem...
I am looking for a simplified design method for a soldier pile wall. I have the more complex ones that require iteration, but i was once taught a much simpler version, that I have since forgotten!
It is just for small walls
Thanks very much
Another question about backpropping of a suspended slab (not in a multistorey building)
It appears to be common practise around here to strip formwork after a number days and replace with backprops. I have seen backprops at much fewer (at greater centres) than the props that were holding up the...
Hi,
I am having trouble visualizing this..
I got this image off a prop-hire business website
Is that ok as pictured, or do you need to laterally restrain the top of the props?
Thanks
Hi, my question is whether is possible to repair a damage tilt up panel in situ..
The building is a steel portal frame factory approximately 6.2m tall at the apex, on the gable end 2 panels have been damaged by a truck impact, damage is below 2.5m height. The panels are 3m wide each and span...
Hi,
We have recently seen a cantilevered concrete block retaining wall fail due to corrosion of the starter bars at the base of the stem where it joins the footing.
We have considered galvanized starter bars for these types of walls as a result, however predictably most builders have a problem...
Hi,
I've been told there is a maximum height of 1100mm (3ft something) on brick retaining walls (2 brick skins with a 100mm concrete filled cavity).
I think it has to do with deflection, however I'm not sure.
Does anyone else know why this is and if it's true?
I guess there is an issue with...
Hi,
I am designing a maximum 2m high soldier pile (steel H sections) in clay. It is a replacement for a similar wall that has rotted out. I don't know anything about the clay except that it is 'good and firm', and that the retained soil has water delivered to it from an uphill property. I am...
Hi,
I have to do an analysis on a flat roof that is deflecting and has a pond at the lower end full of water rusting through the roof sheet.
The purlins are 200x47 oregon spanning up to 7.5m (so they are undersized already). The roof sheet is deep profile (Kliplok here in Australia) with 41mm...
Hi,
This is actually from previous versions of the code also, however Cl 8.1.10.4 (b) says that 1/4 of the midspan positive reo "shall continue past the near face of the support"
How come there is no distance prescribed? what does this mean? does 0.1mm past the face comply?
Thanks
Does anyone have a copy of AS2699?
If I am given a 'characteristic capacity' in kN of a brick tie by the manufacturer, what is the phi factor I would apply to this to get my design capacity?
I assume this would be in AS2699?? I am a bit over buying codes and then not finding the info i was...
Hi,
This photo shows a repair in a carpark slab on ground. Apparently a water hydrant line failed under this point so the builder saw cut a hole, fixed the pipe and did this repair.
You can see there are radiating cracks out from the hole. I am assuming this is due to a release of shrinkage...
Hi,
Nice easy Friday arvo question..
AS3600 is clear in saying that for exposure classification B2 (above ground exterior within 1km of coast) you must use 40 MPa concrete. Does 'above ground' apply to slabs on ground?
At this office (my first structural workplace) this is common for...
Hi,
In slabs on ground, we put in diagonal bars at re-entrant corners to prevent shrinkage cracks propagating from the stress concentration at the corner.
With re-entrant corners in suspended slabs (say a 90 degree wall under) there is a similar stress concentration due to the bending under...
