I am wanting to build a freestanding pergola, 6m x 6m, with a skillion style roof with a slight slope from front to back supported on only 4 posts the two front posts at a height of 2.8m and the two rear posts at 2.3m which are going to be 200x200mm outdoor.
What size of I beam will I need to span a 5m gap with the beam sitting on atleast 150mm wall either side therefore beam length 5300mm with an evenly distributed load totaling 1000kg. If I replace one wall with a 2.4m high vertical metal beam I or H which will take the load on one side, what size would it have to be? Regards, Chris.
For example, we would suggest the use of 47 x 125mm for up to a 3.6m span and 47 x 150 for up to a 4.8m span. All timber is fully treated and tanalised softwood. As with all pergola components, the main beams are made specifically to your order and non-standard lengths of timber can be cut to order.
more clarity needed, is the pergola 6m x 6m? I am trying to understand where 1800 rafters span comes into it. based on a verandah beam 6m span where the rafters only span 1800 RLW 900mm a 240 x63 LVL will do the job with 20kgm2. Are you planning a skillion roof or pitched?
Column size you can take it as 300*300 . For beam depth should be approximately 600 L/10 and width can be anything around 230 mm. As it's just a residential house so there won and 039;t be huge loads.
A large cedar pergola cedar pergola span swanson 2 jpg attached images attached images 12 x 20 timber frame pergola kit installed over backyard patio for shade.