Browse Forums Outdoor Living 1 Oct 22, 2012 8:30 pm Hello - I am planning on building a gazebo (freestanding), 4 sided on an existing slab, and I have a question about the best way to anchor it to the slab. The slab is quite thick (200m at edge - not sure inside that - probably 100-150), and reinforced. I did not lay this slab, it used to have a large garden shed on it which I have gotten rid of. The plan I have is the structure to be approx 3mx3m, and about 2.2 m high to the bottom joist which will have a square hip roof. Anyway - getting to my question (finally!), I dont have a good feel for how strong the post anchors fixtures need to be. I had already bolted down post stirrups using 2 10mm x 75mm concrete screws per anchor (4 anchors), but I am concerned that this is not sufficiently strong for a freestanding structure. I am tempted to remove the screws and use a heavy duty chem set using the same holes (possibly drilled deeper) as I believe this will be much stronger, and replace the anchors. Any thoughts on this? Re: Bolt down anchors - how strong? 4Nov 15, 2012 10:21 am I recently spec'd a set of verandah plans that was to be built over existing exposed aggregate paving. I specified that the paving was 100mm reinforced with a 75mm or so M10 dynabolt holding the stirrup down. Council had no problems with that. Concrete screws (bluetip?) wasn't favored by the council however. Concrete screws are rated for side shear and pull but it's not common practice and therefore councils prefer to stipulate dynabolts. Chemset would be possible but maybe too much. How long is a "long period"? For a few weeks, it should be ok. It also depends on the area you live in...I would let your neighbours know that you will be away too and… 1 28562 Hi HomeOne, I'm in the midst of landscaping a cat run down the side of my house, and the recent rains have me wondering if I need to install some sort of drainage. I've… 0 12246 Hi I live in a 100yr old semi and my neighbour added an additional floor last yr and our architect has advised that we can knock down our semi and build a free-standing… 0 37681 |