Browse Forums Renovation + Home Improvement 1 Sep 23, 2014 9:30 am G'Day - a quick bearer span question - appreciate any suggestions. Deck on brick piers, 1m from the ground. I'm limited in height to 90mm bearers and 90mm joists. Piers are at 1.6 centres (span 1450). Floor Load Width: Bearer A and C = 750mm Bearer B = 1500 Continuous bearer: Is a 90x70 sufficient (H3 pine, F7), should I double two 90x70s? Is there a more suitable alternative like a 90x90 or treated hardwood? Re: Quick Bearer Span Question 2Sep 23, 2014 11:56 am You should be within specs with 2 / 90x45. But that might cause some bounce. Why are you limited to 90mm bearers and 90mm joists at 1m off the ground? Maybe consider due to cost of buying hardwood to lop off a brick or two off the piers and using wider boards? By the way, treated hardwood doesn't exist and funny enough, hardwood has a lesser lifespan than treated pine. Go figure. Re: Quick Bearer Span Question 3Sep 23, 2014 10:35 pm Thanks Adam. The land slopes and clearance is less on one side. Also a double brick perimeter wall. Hardwood 100x75 seems to be a dollar cheaper actually. Or I could double up 2/90x70 treated pine bearers. Would one of those work do you think? Re: Quick Bearer Span Question 4Sep 24, 2014 4:45 am LVL's or laminated veneer lumber , may well have a higher load rating than straight T2 H2 pine. Try tillings or hyspan products wobbly Design from top down to ground , build from ground up Re: Quick Bearer Span Question 5Sep 24, 2014 11:58 am I built a low level deck around my pool (to preplace the existing deck that had rotted & collapsed). I built it on the cheap by using treated pine garden sleepers (200x75) for bearers Structurally an overkill but I no longer had any bounce. Notch the beams to suit the piers or alternatively build the deck sub structure in the same plane by using heavy duty galv brackets and bolts, so the joists sit between the bearers. Re: Quick Bearer Span Question 6Sep 24, 2014 5:18 pm Beetaloo heavy duty galv brackets and bolts, so the joists sit between the bearers. I think Beetaloo's answer is the best option. That way you can use a thicker joist and bearer and have less issues. Can you even get 90x70 treated pine F7? You would be looking at a 140 wide horizontal surface prime for collecting water and rot. The reason you need 2 pieces for a bearer is for strength but more so structural integrity. If one snaps due to a notch, you still have the other one. Re: Quick Bearer Span Question 7Sep 25, 2014 6:24 pm Thanks everyone! Love this forum. I have found a product called Superlam which is a laminated hardwood product. It comes in 90x70 and is H3 treated. Manufacturer recommends it for deck bearers and spans more than 2m with a FLW of 2400 (mine is only 1500 anyway). Will get some pics up here when complete! Seconded; we just used these last weekend to build a small deck. They worked perfectly as we have bluestone in the area where we wanted to build so digging down was not… 8 9083 Hi Mrboh Just wondering if you have any BAL or flame zone issues on your block, as getting compliance with BAL requirements whilst doing bearers and joists is tough. Not… 1 8376 Hi, Really struggling to find some consistency amongst Span Tables, can anyone help… 0 2670 |