Hip length


#1

hip length
Posted: Dec 30, 2008 11:02 AM Reply

i am building/erecting a small model roof

from 2-1 timber,i have built a 600x400mm area roof on some ply and used a bit of 2-1 also for wall plate

i have drawn out my common rafters on some ply and erected the 1st part of the roof perfect

4 common rafters
1 ridge
2 crown rafters
pitch of roof i decided on was 40 deg

i am trying to cut and fix the hip rafters one by one,but seem to be either too short or slightly too long in my measurements everytime

i have worked out the exact angle/plumb cut etc etc

it is just the length i am out

i have been measuring from where the crown/common rafter meets the edge of the ridge and then down to the corner (without taking any part of the corner off)

my questions are,do i need to take corner off 1st,or can i do it without doing that?

where exactly do i measure from on timber,the point or where the plumb cut starts?

if i take out some of corner do i need to bare this is mind when marking out length?

at moment i seem to be nibbling out a bit from here,addding a bit from there,heads in bits and its not acurate enough for me to be confident to proceed to jacks

any help would be grateful


#2

if you post the exact width of entire model, pitch,and length of overhang, I can give you an exact length of hip rafter from point of 45 to top of plumb cut at bottom…also hip drop allowance,and over hang length


#3

If your using graphing paper than every block would represent a foot and eveything would be the same but you need a common reference point to build scale models