Joist floor and chimney stack

marsaday

Do i attach joist hangers into the chimney stack or do i trim and go around them?

i will be spanning the joists into the party wall and off a spine wall. Span is about 4m's. i have a chimney breast in the way and it is 135cm wide. Can i hang 3 joist hangers off here or do i double up the joists at both sides of the chimney breast and run joists between these 2 doubled up joists ? if i do this should the joists between the doubled up joists be also doubled up themselves?

tony

Trim round it

tony

Double each side rest singles

joe90

A question,

does this trimming round also apply to new builds where flue liners made of pumice or similar are required by regs?

Ta

tony

I think so. Once had a fabulous arguement with a BI about why I had not built my joist end into a chimney breast

He went red in the face when :shamed: I said that I would be concerned about it catching fire !

sune

Doc J 2.18 b) You need a min 40mm gap between the masonry chimney and structural timbers. Non structural timbers like skirting can touch provided this is OK from the manufacturer.
It is worth having a look at diagram 21..