Browse Forums General Discussion 1 Aug 15, 2018 10:27 pm Hi, When measuring the location of drain pipes and the actual size of the slab , would contractors use the edge piers as the boundary of the slab? Basically my engineering gives the options of putting in bored piers or screw piles. So my builder uses screw piles. The diameter of a screw pile is significantly less than a bored pier (450mm).. And the piles are drilled into positions marked with "+" sign on the ground. The plus sign is like 450mm diameter. So if they use the top of the screw pile as guide basically the measurements would be all wrong. From the drain pipes to the slab. I rather not ask my builder for now, trying not to barge into their area of expertise and get the look of "Leave the building to us"... They haven't don't the slab form work yet. I'm sure all is well and they know what they are doing.. I'm just been a little paranoid. Re: Screw pile and slab boundary. 2Aug 15, 2018 11:24 pm The location of the piers don't determine the extents of the slab, a surveyor does (using the structural drawings and the site plan). Any piers located along the perimeter of the slab are likely to be centred on the perimeter/edge ribs (likely annotated as PR or ER on your structural drawings). If the pier diameter is greater than the width of the edge rib, then a portion of each pier will project beyond the face of the slab in the vertical plane. Re: Screw pile and slab boundary. 3Aug 16, 2018 12:11 am iTool The location of the piers don't determine the extents of the slab, a surveyor does (using the structural drawings and the site plan). Any piers located along the perimeter of the slab are likely to be centred on the perimeter/edge ribs (likely annotated as PR or ER on your structural drawings). If the pier diameter is greater than the width of the edge rib, then a portion of each pier will project beyond the face of the slab in the vertical plane. Thanks. I gather that much. Just need assurance. After the site was cut and then pegged the detailed pegging and lines were lost during the installation of piers and the drainage. Except for the further out pegs not on the perimeter of the slab foot print. Then they re flatten and compact the areas that will be the footprint of the slab. I guess those outer peggings will be used during the form work of the slab? But they don't look very detailed compare to the initial pegs. Re: Screw pile and slab boundary. 4Aug 16, 2018 8:27 am Why don't you wait until they've installed the edge boards and then measure it to satisfy yourself? There's no harm in keeping an eye on things, but there's also no point speculating before the fact - you'll just drive yourself crazy. In the event that they set it out incorrectly, it's easy to rectify before the pour. If what you describe is correct then the brick wall has been dry lined with villa board. That basically means that the villa board is glued to the brick wall with… 3 6090 You should be able to encase the sewer but you will need it designed and approved and access to lot 580 to do the work 2 12615 ask the surveyor for clarification would be the logical approach 1 15947 |