Browse Forums Building Standards; Getting It Right! Re: Pad footing excavation and existing footing 2Jan 01, 2022 8:28 am Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Pad footing excavation and existing footing 3Jan 01, 2022 2:16 pm StructuralBIMGuy Hey AnnaRos Welcome to the forum Not sure if you are owner or builder renovating or some where in between But I would highly recommend that you have certified construction and engineering details/notes and data that are easy to follow on site. Structural elements should also be independently inspected/checked. Just curious why are you digging the trenches..Your Builder can't be holidaying in Bali...too soon? (humour) BTW trenches are usually dug the day before the pour and inspected to sort out non compliance or whatever depending on the soil and weather conditions? LOL, I generally call out bad concreting, eg. here Concrete inspections Unfortunately your photos aren't visible. Try using the full editor and direct upload OT, The better the post, the better the response + it helps others. The last thing you want is a slap on the back, a wink, a thumbs up, and "She'll be right" when a structural defect is pending. If you have partaken in the work chances are you'll get blamed Cheers Hi, to clarify: - the works have been fully engineered (incl. pad footing specifications etc) - a building permit has been issued - a building surveyor will inspect per standard process before concrete - the Buidler and the BS will liaise on this - I am not an owner builder - I am simply doing non structural demolition, and digging the required 2 footing holes to save some cash and re invest in the build - Being on holidays, I have commenced the work I committed to doing before the builder commences - simply, digging a footing hole per the engineering specification - the builder will validate, building surveyor inspect, prior to concrete pour All I want to know is by leaving the footing hole for a few weeks will this likely cause any undermining of existing footings See photos - will make more sense Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Pad footing excavation and existing footing 5Jan 01, 2022 4:07 pm Thanks for the photos, Make sure the surrounding soil at bottom of the footing is dry, firm and the new pad should be dowelled/pinned into the existing footing BTW, try cross referencing plan locations and photos for archiving and future reference. A tape measure in the photo for reference on close ups is advisable,etc,etc Also photos should be taken as the structural drawings are read. eg, Footings looking down, Anything above the ground from beneath looking up. Structural drawings are the opposite to architectural drawings... Cheers Chris Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Pad footing excavation and existing footing 6Jan 01, 2022 4:28 pm [quote="StructuralBIMGuy":10vi2hqt]Thanks for the photos, Make sure the surrounding soil at bottom of the footing is dry, firm and the new pad should be dowelled/pinned into the existing footing BTW, try cross referencing plan locations and photos for archiving and future reference. A tape measure in the photo for reference on close ups is advisable,etc,etc Also photos should be taken as the structural drawings are read. eg, Footings looking down, Anything above the ground from beneath looking up. Structural drawings are the opposite to architectural drawings... Cheers Chris[/quote:10vi2hqt] Thanks - yep that’s all in the builders hands (dowelling etc per engineering / soil tests conducted). I just wanted to re iterate my concern - I’m just digging the hole, that’s it. per your comment, in a typical scenario, the duration between digging the hole, inspection and concrete would be substantially shorter than what i’ve done - by pulling the trigger early on the digging, am I now at risk of the existing strip footing being undermined? Only questioning as we’ve dug right next to it, per the proposed location of the new pad, at a depth lower than the existing, again per the engineering (the hole = 400x650x550)…. Should I be filing it back in with dirt, compacting and waiting until the day it’s actually required? Once the concrete is in, it’s not an issue, the concern is the extended period prior StructuralBIMguy Re: Pad footing excavation and existing footing 7Jan 01, 2022 4:38 pm I wouldn't be filling it in, The guys will trim and clean out the bottom on the day of the pour hth Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs No one can give you a meaningful answer without looking at your building contract, what happened on site and who designed your house You should get experienced building… 1 10463 Hi there, We’ve recently had plans approved to add a 1st storey addition to our existing house for a growing family in Sydney. With the current cost of building… 0 5379 We just had a pool dig and was told by our contractor the pool would need piers. They spoke to the engineer who advised the piers would need to be concrete. When the… 0 1100 |