Hi Struct.Engs.
I would like to ask you for your advice, which reinforcement arrangement did you make best experience?
The case is: A column changes the Dimensions from 450x800mm to 450x450mm
what is the best way to stop the reinforcement now?
i prepared some sketches for you, it would be...
Hi Struct.Engs.
I have a problem with a ansymetric column.
Don't know if I get Fixing Moments by a Column-Beam connection
and if I get, with wich lever arm?
It is actually a typical detail but how to handel it?
BauTomTom
Hallo
In the books you find every time the same detail. Between the wall and the surface bed you should have the expansion joint. Here in South Africa it is 12mm.
It is a problem because it must be sealed and 12mm is somehow to much. ants could also come through this joint into the building...
Hallo
are there some experiences in the setting out of the joints in the surface bed? you need to provide some construction joints and also some saw cut joints in the concrete floor on the ground (surface bed)
how should this areas be specified? squares like 4m x 4m?
can they be also...
Hallo Engineers
I just wanted to find out if it necessary to provide a sand layer under the concrete surface bed.
Very often you see this detail in books. I guess it is there to level the natural ground
Section would be then (from top to bottom):
1. tiles
2. surface bed 100 mm
3. plastic...
Hallo Struct.Engs
Am looking for the best solution for the spacing of column links. Different codes give just a fixed spacing all the same through the whole column. Other codes here in this case EURO code says again to reduce the spacing between the link by 0.6 by
- overlapings
- above the...
Hi
it is difficult to explain you must see the attached sketch. By a curved slab how would you place the Ubars to close up the reinforcement of the cantilever slab?
90 degrees to the curved edge or would you stick to the parallel bars according to all the rest?
BauTomTom
Hi Struct.Engs.
There are two different kind of concrete testcubes, at least her ein south africa (SABS) 150x150x150 and 100x100x100. At the laboratory they opperate with this two but 90% of the cubes are still the 150x150x150
Why actually?
Why not going for the smaller one?
BauTomTom
Hi
there are different possibilities to position and arrange the reinforcement by a continues beam over a support. this is the case where you get the support moments into the beam with the tension forces in the slab.
I just wanted to find out the best solution for a case where the bars are...
I was studying different codes and realized that the ration of Reinforcement area to concrete area varies very much from code to code.
What is actually the reason for? Why is it critical when you have to much steel in a column? What if you could still provide enough clearance between the bars...
Hi Struct.Eng's
There are three different or maybe even more possibilitys how to connect the beam reinforcment to a edge column or the slab reinforcment to the concrete retaining wall.
Have a look on the attached sketch. Me personal I like the left solution because it is easy to manage on...
Hallo Struc.Eng's
how important is it actually to provide a DPC plastic under the surfacebed? The detailing books actually shows that the DPC should go then actually even from under the surfacebed into the wall. Lets say maybe 400mm above the ground level.
How important is it actually and when...
Hi struct.engs
I would like to ask something about the position of the column bars splicing. Does the upper bars really need to start at the floor level or can the splicing be also done in the 1/3 of the column height?
See attached sketch
and the left, ref bar
we discussed it already one...
Hi
is there a code or a document with recommendations which line thickness shall be used for structural plans by different sections for concrete, reinforcement, bricks, steel and etc.
for example a concrete drawing when you cut through a column base, the edge will be shown as thick line
but...
Hi
I wonder why the watertanks needs to be so high. Don't you get the same pressure when you tank is just low and only one small tank is placed in the right height to create the necessary pressure?
Then the whole tower structure could be much more lighter
See attached sketch
And, is it also...
Hi
I have a problem with a expansion joint in a concrete slab. The joint is 20mm and the slab is exposed to the outside. This means sun and rain.
Now we don't want that the cars below would get wet. Which kind of a water stop would you recommend. I drawn up four different types.
The cars...
Hi
following case: Lift shaft with a kind of sump. That one is full with water and the people don't know hoe it actually gets there, since it flows so slowly in.
Is there a possibility to cover the concrete surface with some stuff and (i suppose as a weak spot the intersection, surface bed...
Hi
Does somebody know if it is possible to transfer the load from a offcenter beam into "center load" for the column?
Surely the arrangement of the reinforcement in the head of the column can have a positive influence but how to do it and how much does it actually help?
Please see the...
Hi Guys
it is me again with some backfill problems. When I backfill a column base and compack every layer (250mm) must the bottom layer not be the strongest? the best compacted? It gets all the compactions from above and the weight of all the ground above as well.
Have a look on the attached...
Hi
i wanted nice off shuffer columns with chamfered corners. Now by removing of the formwork i see that the concrete got also few milimeter behind the triangle chamfer strip.
This is quite sharp and not really nice. What is thebest way to remove it now?
Regards
Tom
