Removing Roof Collars for Creating Vaulted Ceiling in Loft

[robgratze]

hi im looking to change my loft room to give it vaulted ceilings but the ceiling joists dont look very nice so i was wondering if i could replace them with steel bars oviously one at a time. i only want it half way acrross so was going to screw on the metal the existing and the rafter then cut out a section would this be ok and any ideas how big the steel would need to be. im not sure my decription is so good so ive included a rough sketch any help wouldbe great thanks rob

[stoneyboy]

Hi robgratze.
You need to get a structural engineer to look at what you propose. The collars are there to tie in the roof rafters - get professional advice.
Regards.
Stoneyboy.