jerkin head roof
DESCRIPTION
Jerkin Head Roof. Examples. What happens to the Hip End. Examples. What happens to the Hip End. Examples. What happens to the Hip End. Examples. What happens to the Hip End. Examples. What happens to the Hip End. Plan. Hips do not go to the corners. Elevation. - PowerPoint PPT PresentationTRANSCRIPT
Jerkin Head Roof
Examples
What happens to the Hip End
Examples
What happens to the Hip End
Examples
What happens to the Hip End
Examples
What happens to the Hip End
Examples
What happens to the Hip End
Plan
Hips do not go to the corners
Elevation
Hips do not go to the corners
Isometric
Hips do not go to the corners
Compare Hip End
Height of End Wall
Height of Soldier Wall
Common Rafter
Height of Soldier Wall
Common Rafter
How do we get the wall height?
Height of Soldier Wall.The wall is 1.350 from the edge
.Say, the roof is pitched at 22° then the height of the wall will be: = 1.350 x 0.404
= 0.545 m
1350
545
22°
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Real World Exercise
Span 8200
Pitch 25°
Client Request Soldier Wall to be 1200mm
What do we know
Span 8200
Pitch 25°
Half Span =Rise =
What do we know
Span 8200
Pitch 25°
Half Span = 4100mmRise =
Gathering Point ½ Span Back
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
A
A
4100
1912
25°
Section A – A Normal Hip
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
A
A
4100
1912
25°
Section A – A
1200
25°
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
A
A
4100
1912
25°
Section A – A
1200
25°
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
A
A
4100
1912
25°
Section A – A
1200
1912-120025°
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
A
A
4100
1912
25°
Section A – A
1200
71225°
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
A
A
4100
1912
25°
Section A – A
1200
71225°
x
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
4100
1912
25°
Section A – A
1200
71225°
These Triangle are similar
x
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
4100
1912
25°
Section A – A
1200
71225°
These Triangle are similar.
RULE – In Similar triangles the RATIO between the sides are the same
x
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
4100
1912
25°
Section A – A
1200
71225°
Always put the required answer on top
x
x = 4100 712 1912
Corresponding Side
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
4100
1912
25°
Section A – A
1200
71225°
x = 4100 x 712
1912
x = 2919200 1912
x = 1527
1527
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
4100
1912
25°
Section A – A
1200
71225°1527
x = 4100 x 712
1912
x = 2919200 1912
x = 1527
y = 4100 – 1527
y = 25732573
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
4100
1912
25°
Section A – A
1200
71225°x
OPTION B
x =712 ÷ tan 25˚
x = 1527
y = 4100 – 1527
y = 2573
y
Real World Exercise
Span 8200
Pitch 25°
Half Span = 4100mmRise = 1912
A
A
4100
1912
25°
Section A – A
1200
71225°
Thes