KDR - Rawson Balmoral (Modified) Sydney NSW

We engaged a structural engineer to carry out a slab pre-pour inspection. I'm a mechanical engineer myself and accompanied the structural engineer on the pre-pour inspection. In both our opinions the guys from Nicsons Concrete were doing a good job, but the inspection was some 4 or 5 hours prior to the formwork being completed so we couldn't check some of the formwork that was still to be completed.

I've since done a post-pour inspection and raised the following items to Rawson to check/rectify...

1. At the back of the Alfresco area the lower layer of reinforcing steel seems to have shifted down during the pour and is protruding outside of the slab
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2. The termite collar for the shower room vanity drain pipe is protruding from the side of the slab
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3. The step down to the porch at one area adjacent to bedroom 5 seems to be about 250mm out of place
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4. The right hand corner of the porch should have a rebate for the brick work to extend upwards, similar to what was done for the Alfresco
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5. The rebates for the Alfresco stacker doors need to extend to meet at the corner.
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6. The rebate at the corner of the Alfresco to allow the brickwork to extend upwards at the corner is a bit longer than necessary. I measured it at about 890mm long but the brick work is only 710mm long. Also, the foam blocks under the Alfresco floor level have shifted during the pour producing crooked concrete lines.
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7. There is a short section of external wall that is in line with the step down for the rear workshop wall. The way the slab has been set out in this area there will be no cavity between the bricks and the internal frame for the first 2 brick courses in the edgebeam rebate. I'm curious if this might create a dampness problem and how the termite barrier and damp course will be arranged here.
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8. There is a wet area earthing detail in the engineering plans but I can't see that it's been installed in the shower room or laundry.
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Week 6 Construction
This week the external drainage works were mostly completed. This included the downpipe & surface drainage pipework at the sides and rear, the absorption trench and the connection to the sewer main. The front pipework is to be completed later so it does not get damaged.

It took a bit longer than expected due to encountering a lot of rock in the backyard

Also, made more difficult by some more unwelcome wet weather..
Saturday 8/8/20, 22mm of rain
Sunday 9/8/20, 3mm of rain
Monday 10/8/20, 39mm of rain
Tuesday 11/8/20, 3mm of rain

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Quality control inspector on the job, eagerly checking out the backyard and slab of her new doghouse...
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Week 8 Construction
Lot's of activity on site this week...

• Frame carpenters continued installing the ground floor frames
• Frame carpenters also commenced installing the floor joists
• First floor perimeter safety rail installed
• Stair void fall protection installed
• Concreters returned to fix the the slab defects (more on that later...)

There's quite a number of steel columns and beams in the house structure. The largest beam weighs 1.25 tonnes and the crane couldn't reach to the back of the house to lift it into position so a different crane had to be brought to site a couple of days later. Another of the beams was found to have some connection bolt holes drilled in the wrong location which was corrected on site by welding the connecting beams into position.
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Hi Vin, The bolting issue was found by the contractor putting up the frame. It looks to be an error by the steel detailer/fabricator. The bolt holes were only about 45 to 50mm out of position but it would not have been possible to put up these steel beams with that misalignment.