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Broken Hip Roof - Presentation


Lay out of Hip

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Broken Hip Roof

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Broken hip roof l.jpg

Broken Hip Roof


Slide2 l.jpg

Lay out of Hip & Valley Roof

Roof Pitch = 25⁰


Slide3 l.jpg

Lay out of Hip & Valley Roof

Roof Pitch = 25⁰

What Members define Creeper side cut


Slide4 l.jpg

Lay out of Hip & Valley Roof

Roof Pitch = 25⁰

What Members define Valley Creeper side cut

  • What Members define Creeper side cut

  • Half Span

  • Common Rafter


Slide5 l.jpg

Lay out of Hip & Valley Roof

Roof Pitch = 25⁰

  • What Members define Valley Creeper side cut

  • Half Span

  • Common Rafter

  • What Members define Creeper side cut

  • Half Span

  • Common Rafter


Slide6 l.jpg

Lay out of Hip & V Roof

Roof Pitch = 25⁰

  • What Members define Creeper side cut

  • Half Span

  • Common Rafter


Slide7 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

No new bevels need to be developed


Slide8 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

All Bevels and edge cuts are the same as a hip roof

Broken Hip

As Span is not the same the rise will not be the same


Slide9 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Hip Rafter Minor Span

Crown End Minor Span

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Common Rafter Major Span

Common Rafter Minor Span

Hip Rafter Major Span

Valley Rafter Minor Span

Centring Rafter Minor Span

Crown End Major Span

Crippled Centring Rafter

Broken Hip

Centring Rafter Major Span

Gathering Point


Slide10 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

With the more complex roof a roof is. It is important to plan & determine as much of the roof offsite that you can

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35


Slide11 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span =

√2


Slide12 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span

= Plan Length x Rafter Length / m

= (1000 – 17.5) x 1.103

= 982.5 x 1.103

= 1084

√2


Common rafter major span plumb cut l.jpg

Common Rafter – Major SpanPlumb Cut

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide14 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span =

√2


Slide15 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span

= Plan Length x Rafter Length / m

= (675 – 17.5) x 1.103

= 657.5 x 1.103

= 725

√2


Common rafter minor span plumb cut l.jpg

Common Rafter – Minor SpanPlumb Cut

  • As Major & Minor Span are the same pitch the plumb cuts must be the same

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide17 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof

= (½ Span – ½ Ridge) x Rise / m

= (1000 – 17.5) x 0.466

= 982.5 x 0.466

= 458

√2


Slide18 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

= (½ Span Major – ½ Ridge) x Rise / m

= (1000 – 17.5) x 0.466

= 982.5 x 0.466

= 458

√2


Slide19 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof =

= (½ Span Minor – ½ Ridge) x Rise / m

= (675 – 17.5) x 0.466

= 657.5 x 0.466

= 306

√2


Slide20 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

√2


Slide21 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

To develop other Roofing Members we need to determine the plan length first

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

We recall that all hips & valleys bisect corners.

In this building it means that they are at 45⁰.


Slide22 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span

= Plan Length Crown End Rafter x Hip length/m

= (1000 – 17.5) x 1.489

= 982.5 x 1.489

= 1.463

√2


Hip rafter major span plumb cut l.jpg

Hip Rafter – Major SpanPlumb Cut

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide24 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span =

= Plan Length Crown End Rafter x Hip length/m

= (0.675 – 17.5) x 1.489

= 657.5 x 1.489

= 979

√2


Slide25 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

1.489

1.103

0.466

1.000

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span =

= Plan Length Crown End Rafter x Hip length/m

= (0.675 – 17.5) x 1.489

= 657.5 x 1.489

= 979

√2

Valley is the same as the hip


Hip rafter minor span plumb cut l.jpg

Hip Rafter – Minor SpanPlumb Cut

  • As Major & Minor Span are the same pitch the plumb cuts must be the same

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide27 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

Determine Centreline LengthCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span = 979

1st Creeper Major

Plan Length = ½ Span – Spacing + Correction

= 1000 – 300 + (1.414 x -17.5 + 17.5)

= 693 x Rafter Length / m

= 693 x 1.103

= 764

1.489

1.103

0.466

1.000

√2

Note these measurements are directional as it goes back towards the Top Plate it must be a negative


Creepers major span plumb cut l.jpg

Creepers– Major SpanPlumb Cut

  • Creepers are the same pitch as the Common Rafters. They must have the same Plumb Cut

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide29 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

Determine Centreline LengthCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span = 979

1st Creeper Major = 764

1st Creeper Minor = 406

Plan Length = ½ Span – Spacing + Correction

= 675 – 300 + (1.414 x -17.5 + 17.5)

= 368 x Rafter Length / m

= 368 x 1.103

= 406

1.489

1.103

0.466

1.000

√2


Creepers minor span plumb cut l.jpg

Creepers– Minor SpanPlumb Cut

  • Creepers are the same pitch as the Common Rafters. They must have the same Plumb Cut

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide31 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span = 979

1st Creeper Major = 764

1st Creeper Minor = 406

1st Valley Creeper = 698

Plan Length = ½ Span + Valley Correction – ½ Ridge

= 675 - (1.414 x -17.5 + 17.5) – 17.5

= 633 x Rafter Length / m

= 633 x 1.103

= 698

1.489

1.103

0.466

1.000

√2


Slide32 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Edge Bevel for Valley Creepers

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

What Triangle forms the Bevel


Crippled or valley creepers plumb cut l.jpg

Crippled or Valley CreepersPlumb Cut

  • Creepers are the same pitch as the Common Rafters. They must have the same Plumb Cut

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide34 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

To develop other Roofing Members we need to determine the plan length first

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Determine Crippled Centring Rafter


Slide35 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

To develop other Roofing Members we need to determine the plan length first

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Determine Crippled Centring Rafter

We recall that all hips & valleys bisect corners.

In this building it means that they are at 45⁰.


Slide36 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

To develop other Roofing Members we need to determine the plan length first

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Determine Crippled Centring Rafter

Hips at 45°

1000-675 = 325

½ Span Major – ½ Span Minor


Slide37 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

To develop other Roofing Members we need to determine the plan length first

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Determine Crippled Centring Rafter

We recall that all hips & valleys bisect corners.

In this building it means that they are at 45⁰.

Therefore where the Broken Hip intersects the Ridge Minor Span must be 325mm from the Centreline of the Ridge Major Span


Slide38 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

To develop other Roofing Members we need to determine the plan length first

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Determine Crippled Centring Rafter

Both Hips at 45°

1000-675 = 325

½ Span Major – ½ Span Minor


Slide39 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

To develop other Roofing Members we need to determine the plan length first

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Determine Crippled Centring Rafter

= (½ Major Span – ½ Minor Span) x 2

Or

= Major Span – Minor Span

This must be 2x

This


Slide40 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

To develop other Roofing Members we need to determine the plan length first

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Determine Crippled Centring Rafter

As the valley is at 45⁰ the intersection with the valley must be a further 325mm


Slide41 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span = 979

1st Creeper Major = 764

1st Creeper Minor = 406

1st Valley Creeper = 698

Crippled Centring Rafter = 689

Plan Length = Major Span – Minor Span + Valley Correction – ½ Ridge

= 2000 – 1350 + (1.414 x -17.5 + 17.5) – 17.5

= 625 x Rafter Length / m

= 625 x 1.103

= 689

1.489

1.103

0.466

1.000

√2


Crippled centring rafter plumb cut l.jpg

Crippled Centring RafterPlumb Cut

  • Crippled Centring Rafter is the same pitch as the Common Rafters.

  • It must have the same Plumb Cut

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide43 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Edge Bevel for Crippled Centring Rafter

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

What Triangle forms the Bevel


Simple bevel development l.jpg

Simple Bevel Development

From Previous

  • Plumb Bevel Rafter

  • Level Bevel Rafter

  • Edge Bevel Creeper

  • Edge Bevel Purlin

  • Plumb Bevel Hip

  • Level Bevel Hip

  • Edge Bevel Hip

  • Face Bevel Purlin


Slide45 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Every Valley Creeper must have an opposing creeper

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35


Slide46 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Every Valley Creeper must have an opposing creeper

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35


Slide47 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Every Valley Creeper must have an opposing creeper

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35


Slide48 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Every Valley Creeper must have an opposing creeper

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

From previous calculations we determined the following


Slide49 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Every Valley Creeper must have an opposing creeper

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Centreline length is the same as distance from the gathering point


Slide50 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Every Valley Creeper must have an opposing creeper

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

To determine true length Long Pt

Centreline length 325

+/- Long Point Correction -7.5

(-17.5 x 1.414 + 17.5)

Deduct ½ Ridge 17.5

Plan Length = 325 +-7.5 - 17.5


Slide51 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span = 979

1st Creeper Major = 764

1st Creeper Minor = 406

1st Valley Creeper = 698

Crippled Centring Rafter = 689

Crippled Creeper Matching = 331

Plan Length = ½ Span Major – ½ Span Minor + Valley Correction – ½ Ridge

= 1000 – 675 + (1.414 x -17.5 + 17.5) – 17.5

= 300 x Rafter Length / m

= 300 x 1.103

= 331

1.489

1.103

0.466

1.000

√2


Crippled matching rafter plumb cut l.jpg

Crippled Matching RafterPlumb Cut

  • Crippled Matching Rafter is the same pitch as the Common Rafters.

  • It must have the same Plumb Cut

1.489

1.103

0.466

1.000

√2

Plumb Cut


Slide53 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span = 979

1st Creeper Major = 764

1st Creeper Minor = 406

1st Valley Creeper = 698

Crippled Centring Rafter = 689

Crippled Creeper Matching = 331

Creeper Shortening = 331

Rafter Spacing x Rafter Length / m

= 300 x 1.103

= 331

1.489

1.103

0.466

1.000

√2


Slide54 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

As both spans are the same pitch they are SIMILAR so Creeper Shortening is the same for both spans

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span = 979

1st Creeper Major = 764

1st Creeper Minor = 406

1st Valley Creeper = 698

Crippled Centring Rafter = 689

Crippled Creeper Matching = 331

Creeper Shortening = 331


Slide55 l.jpg

Roof Pitch = 25⁰

Lay out of Broken Hip Roof

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Rafter Spacing 300mm

So the roofing members we have previously looked at are determined the same way

Determine Required LengthsCommon Rafter Major Span = 1084

Common Rafter Minor Span = 725

Rise Main Roof = 458

Rise Minor Roof = 306

Hip Length Major Span = 1.463

Hip Length Minor Span = 979

1st Creeper Major = 764

1st Creeper Minor = 406

1st Valley Creeper = 698

Crippled Centring Rafter = 689

Crippled Creeper Matching = 331

Creeper Shortening = 331


Slide56 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Edge Bevel for Crippled Centring Rafter

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Edge Bevel for Crippled Centring Rafter is the CREEPER EDGE BEVEL

  • The same is for

  • Valley Creepers

  • Crippled Creepers


Slide57 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

Edge Bevel for Crippled Centring Rafter is the CREEPER EDGE BEVEL

  • The same is for

  • Valley Creepers

  • Crippled Creepers

It follows that all the

The purlin bevels are

The same as the hip end


Slide58 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Determine Centreline Length

Broken Hip

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35


Slide59 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Broken Hip Run

325 x 1.414 = 460

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

1.489

1.103

0.466

1.000

√2

Determine Plan Centreline Length = 325


Slide60 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Broken Hip Run

325 x 1.414 = 460

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

1.489

1.103

0.466

1.000

√2

Determine Plan Centreline Length = 325

Centreline True Length

= Plan Length x Hip Rafter / m

= 325 x 1.489

= 484


Broken hip edge correction at base l.jpg

Broken Hip Edge CorrectionAt Base


Broken hip edge correction at base62 l.jpg

Broken Hip Edge CorrectionAt Base


Valley at base of broken hip l.jpg

Valley at Base of Broken Hip


Valley at base of broken hip64 l.jpg

Valley at Base of Broken Hip


Broken hip edge correction at top l.jpg

Broken Hip Edge Correctionat Top


Broken hip edge correction at top66 l.jpg

Broken Hip Edge Correctionat Top


Slide67 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

Plumb cut is the same as the hip

Edge Bevels are the same as the hip

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35

1.489

1.103

0.466

1.000

√2


Slide68 l.jpg

Lay out of Broken Hip Roof

Roof Pitch = 25⁰

With the more complex roof a roof is. It is important to plan & determine as much of the roof offsite that you can

Rafter 90 x 35 @ 450 c to c

Hip Rafters 140 x 35

Ridge 140 x 35