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This is the first delivery of timber and whilst they look like pretty substantial timbers, these are just the 9" x 2" packers required to pack up and out the existing 6" x 2" joists. These 'packers' will then be sandwiched in between structural 9" x 2" C24 timbers which will be hung from the steel beams. Yup, you guessed it, the structural engineer strikes again! |
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The yellow tinged timbers are the C24 structural timbers specified by the structural engineer. When assmbled these timbers will create thirteen 9" x 8" joists. To put this in context, the first floor of my house is supported by single 8" x 2" joists spliced over a supporting wall, much in the way that the existing loft joists are. |
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This is the detail at the splice joint of the existing timbers. The 9" x 2" extends the spliced joist 300mm past the line of where the steel beam will sit. 84mm high timbers will site on top of the existing joist to create a 9" x 4" sized joist. The C24 timber will then sit either side of this and be coach bolted through at staggered centres to create a 9" x 8" sized joist. |
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This is the view from the other side of the joists |
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