Results 1 to 6 of 6

Math Help - Need rise per metre length for builder trying to work out roof pitch

  1. #1
    Newbie
    Joined
    Apr 2010
    Posts
    3

    Question Need rise per metre length for builder trying to work out roof pitch

    So, if length of horizontal side is 13.35m and pitch of roof is 1 degree what is the height of vertical side?

    Sorry for lame question in such a comprehensive forum! Am a builder and having a brain blank.

    Thanks for help.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Jun 2009
    Posts
    806
    Thanks
    4
    Quote Originally Posted by builder View Post
    So, if length of horizontal side is 13.35m and pitch of roof is 1 degree what is the height of vertical side?

    Sorry for lame question in such a comprehensive forum! Am a builder and having a brain blank.

    Thanks for help.
    Hi builder, welcome to MHF.
    Since the pitch is very small, you can write tanθ = h/L = θ.
    Convert 1 degree to radian and substitute in the above equation to find h.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Apr 2010
    Posts
    3
    can u do it for me. I'm no maths genius!!!! your help would mean I can go to work tomorrow and get a roof on a clients house. Thank you for replying.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Super Member
    Joined
    Jun 2009
    Posts
    806
    Thanks
    4
    Quote Originally Posted by builder View Post
    can u do it for me. I'm no maths genius!!!! your help would mean I can go to work tomorrow and get a roof on a clients house. Thank you for replying.
    1 degree = π/180 radian.
    So h/L = π/180.
    Now find h.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Senior Member
    Joined
    Oct 2009
    From
    Brisbane
    Posts
    311
    Thanks
    2
    Quote Originally Posted by builder View Post
    can u do it for me. I'm no maths genius!!!! your help would mean I can go to work tomorrow and get a roof on a clients house. Thank you for replying.
    0.233m approx ie 233mm
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    Apr 2010
    Posts
    3
    thank you so much!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. unit length unit rise ratio
    Posted in the Trigonometry Forum
    Replies: 6
    Last Post: October 16th 2011, 08:45 PM
  2. Free oscillations of a metre rule
    Posted in the Math Topics Forum
    Replies: 10
    Last Post: January 18th 2011, 06:09 PM
  3. Quick check of my work? (Arc Length)
    Posted in the Calculus Forum
    Replies: 3
    Last Post: November 30th 2010, 04:47 AM
  4. Work, Arc length
    Posted in the Calculus Forum
    Replies: 0
    Last Post: April 28th 2010, 08:18 PM
  5. Arc length - please check my work
    Posted in the Calculus Forum
    Replies: 4
    Last Post: March 9th 2009, 06:57 PM

Search Tags


/mathhelpforum @mathhelpforum