Just wanting to confirm moving collar ties is ok?
Wanting extra attic headroom in modern brick & tile 5-bedroom rectangle house (see attached photo).
Plan is to gradually remove the mid span collar ties currently across every second rafter (like lower red collar ties in attached picture).
Then gradually reinstall collar ties across every rafter higher up under the ridge beam; screwed in place to hold for same spec M10 bolts (like upper red collar ties in attached picture).
Collar ties only on half the 12m wide house; area has three under-purlins (plenty of struts and purlin props) other half of house seemingly has same roofing dimensions but only two under-purlins and no collar ties.
Over the years I have discussed with various people and all said ok, but just seeking further thoughts/confirmation (can’t get a professional out to look at such a small matter).
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