Goody69

Yep - its a 6110mm clear span for one across back of house which then is cleated to one same size which is the beam to the goalpost holding side of house up. I was looking for guidance on the blocking out timber section sizes. Using ply packer is a shout so thanks for that Nod Been told using the jiffy hangers is the simplest way to go........ more I think about it more I may do another begging text message to my chippie to come along Friday morning!!!!

This is simple I'm sure but I cannot get straight in my head the timber sizes I need to block out some UB's so jiffy hangers can then be used to take existing joists (and new rafters to the outside). I've had two 254x254x89UB's spec'd up by Engineer, one a beast at 6.10M long; plus a 203x133x25 internally. These are being fitted Friday so I need them blocked out that morning. I'm thinking: 203x133x25 = 175mm x 75mm (7" x 3") 254x254x89 = 200mm x 75mm (8" x 3") plus another sandwich length of 200mm x 50mm (8" x 2") Would that work? Also... I'm using Timber to Timber Joist Hanger - 47 x 272mm as existing are 9"x2"..... is the cutting in a simple enough job that I don't need a chippy (a couple of handymen and two steelfixers will be on site)??? Any views gladly welcome!!!

Just started a ground floor wraparound extension, loft extension and full house refurb in West London. Found here via googling some queries. Despite having been in the Construction Industry for 32 years I am a bit of a domestic novice as my bag for the last 15 years has been office fit out. I've got a fair idea but need ratification lots of the time!!!