I’m going to replace two existing roofs, both to be vaulted ceiling with velux windows. They meet each other with a valley / box gutter.
I friend of a friend has done the structural calculations but I have still have a few questions.
Roof 1 (inside size 11ft by 7ft)
Ridge 50 * 170 * 7ft c24
Rafters 50 * 125 c24
Two velux , one each side (MK04)
Roof 2 (inside size 11ft by 12ft)
Ridge 63 * 225 * 12ft c24
Rafters 50 * 125 c24
Four velux two each size (MK04)
Q1) can I use larger ridge beam e.g 75 * 225 instead of 63 as it’s easier to get.
Q2) can the rafters attach to the side of the ridge beam or does the beam have to be under the rafters with notches cut out of the rafters
Q3) can I user larger rafter e.g. 50 * 150 instead of 125, to allow for the insulation and can the bird mouth cuts be deeper so the extra depth is in the inside of room.
Thanks
I friend of a friend has done the structural calculations but I have still have a few questions.
Roof 1 (inside size 11ft by 7ft)
Ridge 50 * 170 * 7ft c24
Rafters 50 * 125 c24
Two velux , one each side (MK04)
Roof 2 (inside size 11ft by 12ft)
Ridge 63 * 225 * 12ft c24
Rafters 50 * 125 c24
Four velux two each size (MK04)
Q1) can I use larger ridge beam e.g 75 * 225 instead of 63 as it’s easier to get.
Q2) can the rafters attach to the side of the ridge beam or does the beam have to be under the rafters with notches cut out of the rafters
Q3) can I user larger rafter e.g. 50 * 150 instead of 125, to allow for the insulation and can the bird mouth cuts be deeper so the extra depth is in the inside of room.
Thanks