A really comprehensive guide and explanation on marking out an irregular valley rafter. The associated animated graphics were extremely useful in visualising the subtleties of this variant to standard roof constructions. Many thanks for this and previous related posts each of which has clarified important roofing and construction details in a simple manner incorporating great graphics alongside the commentary.

@michaeldownes516

3 жыл бұрын

Hi Jeff, Thanks for this feedback. I have been producing these vidoes based on what I used to draw on a Black Board/White board when instructing Carpentry Joinery apprentices. Now that I have the option of creating these animated versions of the same lessons I cant create them quick enough as I can see the quicker transfer of knowledge that is happening...especially to the Visual Learner.

@jeffbourne6015

3 жыл бұрын

@@michaeldownes516 Michael, your YT posts are an invaluable source of reference and insight. As you point out, visualisation aids make construction details so much easier to grasp. Are you aware of the following old text: Advanced Constructive Geometry by Dowsett ? This contains many superb applied joinery problems.I’m working my way through it progressively out of both curiosity and interest - teaching myself constructive geometry in the process. Three somewhat related and intriguing joinery problems which at some future date yo may like to address are as follows: 1) Sometimes purlins are cut around the bottom edges of hip rafters and mitred together. The bevel used on the side of the purlin for this cut is required. 2) The geometry of joints in splayed work is another interesting topic eg. The corner of a box having splayed sides each of which has a different thickness. 3) Consider the following: A given moulded handrail section is inclined at a prescribed angle to the horizontal to a vertical pier, the other side of which forms a given obtuse angle.The aim is to determine the corresponding profile for the other part of the handrail, again fixed at some arbitrary angle to the horizontal in order that it intersects the original moulding at the corner of the obtuse angled pier. The bevel cuts at the intersection plane are required too. Will be a regular viewer to your channel - once again fully appreciate the content and work which goes into the production of your videos. Many thanks!!!!

@michaeldownes516

3 жыл бұрын

@@jeffbourne6015 Well Jeff, I am not familiar with Dowsetts publication...but i intend to check it out. I have been referring a lot to a book I have since I was an apprentice by a Frank Hilton, titled "Advanced Carpentry & Joinery" which covers Purlin Bevels including the Lip Bevel, Splayed Linings and Hopper Development including the Dihedral Angles and also Handrail Development and Raking Moulds. I also refer to another old book i have titled "Modern Practical Joinery" by George Ellis As it happens the next video i am planning to do is based on the the 3 Purlin Bevels at the Hip Rafter....hopefully uploaded in a week to 10 days. I am also planning to produce some videos related to stairs to include string, winder step and handrail developments. Thanks for your comments and suggestions. All the Best!

@eugeneflynn4211

3 жыл бұрын

@@michaeldownes516 hi michael great videos ,i have a copy of dowsetts geometry book extremely well written will catch uo sometime well done again ,videos are exceptional euge

Micheal it’s all very good stuff! In my experience when doing an equal soffit dual pitch Hip roof, we would calculate the amount to raise the Wallplate for the steeper of the 2 roof pitches, and the Hips or Valleys have a slight shift in relation of thickness to either side of the center line, but the center line stays in the same position lining up with the outside corner of the facia etc.

@michaeldownes516

3 жыл бұрын

Hi Thomas, moving the wall plate upwards on the steeper pitch rather than inwards on the lower pitched roof is sometimes the best option to go with, especially if the rafters will be making contact with the wall before the desired overhang is reached on the lower pitched roof section.

@michaeldownes516

3 жыл бұрын

...i shall address this important option you raised in the public comments section in this video...thanks for your contribution.

Excellent work, very professional.

@michaeldownes516

3 жыл бұрын

Hi Sean, glad you found it usefull.

If you cannot/do not to move the wall plate inwards on the low pitch roof section then you have the option of raising the wall plate on the steeper pitch. To calculate this distance, go to the 25th minute of this video and instead of using the animated horizontal distance between the 2 pitch lines...measure the vertical distance between both pitch lines from the same junction.This will give you the distance to raise the wall plate on the steeper pitch to maintain the same over hang for both pitchs.

@thomasdoherty6726

3 жыл бұрын

Yes, it's all good stuff and I'm still interested and learning in my 60s!

Hello Micheal, at 16:15 is this where you get the plumb lines for both sides of the valley major and minor roof sides if so you mark it from your sheet of ply,

@michaeldownes516

Жыл бұрын

Hi Violet, this is where you get the plumb cut for this valley rafter...you can scale down the roof to fit on your plywood sheet if its just angles you are after (angle wont change if you scale up or down)....if you want deductions add in the width and thickness of roof members at full size on to scaled down drawing of the roof. So, you now have scaled the minor and major runs etc to get it to fit on to your setting out sheet, but the width and thickness of the rafters, ridge board are added at their full sizes so as you can measure off their deductions.

@violetsherwood6494

Жыл бұрын

@@michaeldownes516thanks for the reply, so is at 10:18 where I measure back for the deduction for the two plumb cuts on either side ?

@michaeldownes516

Жыл бұрын

@@violetsherwood6494 thats correct....measure back those deductions show at 10.18 square off the plumb line on both sides of your rafter (this will now transfer you from the line diagram version of the roof to now factor in the thickness of its members)