Recent content by sybie99

Good Day, I have a carport canopy design where the bottom section of the canopy column is concrete and the top is steel. See attached sketch depicting what is required. I need to transfer a 50kNm moment from the steel "star" column on top to the concrete column below. There will be a baseplate...

Thanks Tom, that is exactly what I was after, much appreciated.

For a flat slab, I have been trying to find some info on deflection vs time, for example a graph. Given a constant load, what is the typical rate of deflection? I know it depends on MANY factors, humidity, time of 1st loading, rebar etc. But a general estimate. Say the maximum a slab will ever...

I have a case where the reinforcement bars in a column do not protrude into the slab above, bars were fixed short. The column is cast. No, If a design the column as pinned at the top, I still need to provide minimum restraint so that column top cannot move laterally and remains fixed to slab...

Say you have a step in a flat slab, for example a 150mm step in the soffit and top of slab. Is there any reason why one could not step a continuous slab if the following criteria are met: * You crank bars so that you have one continuous bar across the step * The minimum radius of the bends in...

Hi, This has been discussed before, but I have a few new questions. I have a waffle (coffer) slab, continuous in one direction and single span in other. The single span is 10.25m and the continuous spans are 8.5. It is for office floors, so quite light loading. I am using a 450 thick waffle...

I have received the following feedback from the welder, also see attached sketch: Re the 20mm plate for which I received the drawing the following day after we had completed the job. I used my own expertise and experience and punched 18mm holes in the four corners and plug welded it with a...

Apologies my reply was under the wrong thread, not sure how to remove it?

I have received the following feedback from the welder, also see attached sketch: Re the 20mm plate for which I received the drawing the following day after we had completed the job. I used my own expertise and experience and punched 18mm holes in the four corners and plug welded it with a...

In which way (besides a pure load test) could one test the weld to be able to get an idea of capacity? Normally a 6mm fillet weld would give about 0.5kN/mm capacity, so that would give 25kN capacity for a 6mm weld around the 16mm bar.

kingnero, I am not any kind of expert when it comes to welding, how would this affect capacity, is it at all possible to make a conservative prediction on its capacity? Regards

The tensile capacity of the bar would be about 80kN. Would you get half of that from this connection?

Another photohttp://files.engineering.com/getfile.aspx?folder=98e42286-ba74-4fb3-8002-087b1640dac1&file=20140930_154057.jpg

Hi, I would like to know what tensile force the following welded connection can carry. A 16mm bar (500MPa yield strength) welded to a 20mm thick plate (350MPa). The connection was welded as follows: A 20mm diameter hole drilled in plate, bar pushed through and plug welded on bottom. The gap...

KootK I have decided to also have a steel plate with 4 No 20mm bars butt welded to the plate, to sit below the slab. These bars are then lapped into column. The plate pushes up against slab soffit and then gives a scenario similar to a column that sits below slab.