The design of my first floor extension called for 3 150x50mm joist bolted together for the trimmer joist. However when the joist timber was delivered it was a nominal 47x150mm, when measured it was just 45x150mm. My problem is that all the wood-to-wood joist hangers that I have found are ether too big 150wide or too small 125wide. I have tried to find another timber suppler of 50x150mm c16 without luck.
Can anyone suggest a solution?