Friday, April 12, 2013

Traditional Layout Books

Here's a list of the Traditional Layout books that I have. Some of them are the same books, french vs german. These are not roof framing books for stick framing. These books are for the art of line. However, anyone wanting to be a master roof framer must be able to build a roof  using geometry only and these books present the different geometric layout methods for using the art of line to draw out and build any type of roof.  Also, there are some angles that just can't be calculated with a calculator.

Buy the books in this order:

The new Book on the ancient knowledge of Roof Framing
by Bernd Küppers.
Bernd's book is the first book written in English on complex roof framing geometry.

La charpente en bois
Charpente - Les tracés (French)-- > Basiswissen Schiften (German)
Handbuch der Schiftungen
Schiften nach der Flächenmethode
Manuel Des Traits De Charpente
Traité théorique et pratique de charpente
Charpente - Les bases du calcul (French) --> Basiswissen Dachausmittlung (Greman)
Grundwissen des Zimmerers

French

Traité théorique et pratique de charpente


Louis Mazerolle
http://www.eyrolles.com/BTP/Livre/traite-theorique-et-pratique-de-charpente-9782851010148




La charpente en bois
(authors)
Gilbert Emery
Jean-Michel Emery
Philippe Nairière
Marie-Paule Raimbault
http://www.eyrolles.com/BTP/Livre/la-charpente-en-bois-9782851010223


Charpente - Les tracés
Frame - Plots
(authors)

Peter Kübler
Albert Müller
Andreas Großhardt
Hans Wittmann
Roland Schumacher
Michael Riggenbach
https://www.eyrolles.com/BTP/Livre/charpente-les-traces-9782851011312





Charpente - Les bases du calcul
Framing - Basics of calculationAlbert Müller
Peter Kübler 




Manuel Des Traits De Charpente
Manfred Euchner (author)
http://www.eyrolles.com/BTP/Livre/manuel-des-traits-de-charpentes-9782212118209






German


Handbuch der Schiftungen: Gratsparren, Kehlsparren, Hexenschnitte, Kehlbohlenschiftungen.: TEIL 1
Handbook of Schiftungen: hip rafters, valley rafters, witches cuts Kehlbohlenschiftungen
Manfred Euchner (author)

http://www.amazon.de/dp/3421030855/ref=pe_217221_31005211_M3_dp_1








Basiswissen Schiften: Fachwissen für Holzbautechnik, Betriebsführung und Ausbildung
Basics Schiften: Expertise for Timber Engineering, Operation and Training
(authors)
Roland Schumacher
Albert Müller
Michael Riggenbach 
Peter Kübler


http://www.amazon.de/dp/3871041459/ref=pe_217221_31005211_M3_dp_2







Schiften nach der Flächenmethode
Schiften by area method
(authors)
Peter Kübler 

Roland Schumacher
Elmar Mette
Heinz Bächle
Manfred Euchner
http://www.amazon.de/dp/3871041947/ref=pe_217221_31005211_M3_dp_3


From the contents: Schiften nach der Flächenmethode
  • Introduction, color legend, symbols and designations
  • Hip rafter with Klauenschifter at same roof pitches
  • Gratklauenwechselin position parallel to the horizontal eaves
  • Valley rafters with vertical and waggerechtem section at same roof pitches
  • Valley rafters with witches and Kehlklauenschifter cut at same roof pitches
  • Oblique rafters in a vertical position
  • Oblique rafters in perpendicular position to the roof surface
  • Kehl Bohle transept at right angles to the main roof
  • Hip rafters with witches cut with unequal roof pitches and the same roof overhang
  • Valley rafters for unequal roof pitches with adjusted average witches
  • Strahlenschifter with claw with the same roof pitch
  • Hip rafters for unequal roof pitches with bowed Gratklauenwechsel
  • Sloped wall plate with normal rafters
  • Sloped wall plate with inclined rafters in a vertical position
  • Sloped wall plate with inclined rafters in a tilted position





Basiswissen Dachausmittlung
Basics Combined Band: jibe. Dachau averaging
(authors)
Peter Kübler
Albert Müller
http://www.amazon.de/Basiswissen-Dachausmittlung-Peter-K%C3%BCbler/dp/3871041483/ref=sr_1_1?s=books&ie=UTF8&qid=1367091624&sr=1-1&keywords=Basiswissen+Dachausmittlung



Grundwissen des Zimmerers
Von Franz Krÿ¤mer
http://www.buch.de/shop/home/artikeldetails/grundwissen_des_zimmerers/franz_kraemer/ISBN3-87104-155-6/ID13477546.html?jumpId=6825436




Dachkonstruktionen in Holz. (German) Hardcover – October 1, 2001







The new Book on the ancient knowledge of Roof Framing

by Bernd Kuppers
English Version

http://www.blurb.com/b/5818662-the-new-book-on-the-ancient-knowledge-of-roof-fram?ce=blurb_ew&utm_source=widget

German Version
Das neue Buch vom alten Wissen der Schiftung

http://www.blurb.com/b/5665544-das-neue-buch-vom-alten-wissen-der-schiftung



Thursday, April 11, 2013

Rafter Bevel Angles Translations


I’m  working on a new Android app.
Rafter Bevel Angles, it has the following

  1.  Jack Rafter Plumb To Earth Bevel Angles.
  2. Jack Rafter Plumb To Earth Offset Bevel Angles.
  3. Jack Rafter Plumb To Roof Surface  Offset Bevel Angles.
  4. Rafter Plumb To Earth  Offset Bevel Angles.
  5. Crossing Jack Rafters Plumb To Roof Surface Bevel Angles.
  6. Saint Andre Cross Rafters Plumb To Roof Surface Bevel Angles.
  7. Purlin Rafter Plumb To Roof Surface Bevel Angles
  8. Witches Cut on Hip Rafter with Square Tail Rafters
  9. Hip Rafter Edge Bevel Angles, Backing Angles
  10. Devers De Pas for Jack Rafters Plumb To Roof Surface

All bevel angles  are referenced from the traditional layout method used by the French and Germans carpenters.

This app is for the WorldSkills Carpentry Competition training. With this app the apprentice can verify their geometric layout method while using the traditional layout geometry. It has seat lip cut angles at the hip rafter for all of different types of rotated rafters as well.


Rafter Bevel Angles v 1.0
REQUIRES ANDROID:2.3.3 and up
https://play.google.com/store/apps/d...ls.bevelangles


Buy Rafter Bevel Angles for Android on Google Play Android app on Google Play


English
rafter bevel angles

French
angles de biseau chevrons

German
Sparren Fasenwinkel

Czech
úhly krokve šikmé

Danish
rafter smigvinkler

Dutch
rafter afschuinhoeken

Finnish
kattotuolitilat viistekulmat

Greek
γωνίες λοξοτομής δοκός

Icelandic
þaksperrur bevel horn

Irish
uillinneacha bevel bhfraigh

Italian
trave conici angoli

Japanese
垂木ベベル角度

Korean
쟁기질을하여 밭이랑을 만들다 베벨 각도

Latin
trabe LIMULUS anguli

Lithuanian
gegnių kūginių kampai

Norwegian
rafter bevel vinkler

Polish
kąty stożkowe krokwi

Portuguese
bisel ângulos vigas

Romanian
conic căpriori unghiuri

Russian
углов стропильных конические

Spanish
ángulos cónicos vigas

Swedish
överliggare sneda vinklar

Turkish
mertek şev açıları

Ukrainian
кутів кроквяних конічні

Welsh
onglau befel trawstiau


Wednesday, April 10, 2013

Offset Jack Rafter Plumb To The Earth

Drawing the Offset Jack Rafter Plumb To The Earth on the Rabattement Surface does not work correctly, using the base Profile of the Common Rafter Slope Angle. The seat lines of the Common Rafter Slope Angle make it impossible to establish the correct miter angles at the ends of the jack rafter.

Some of the books written in the past have errors in their geometric drawings. The method's they used for drawing an Stereotomic view of the rafter is not always correct and this is just one example. It's easy to make this type of mistake, without the use of a 3D Cad program or using trigonometry to check the angles. The error in the bevel angles is small enough that a carpenter could have easily cut and installed the  timber without ever knowing the geometric drawing method was not correct.

The correct bevel angle at the foot of the rafter in this drawing is 41.56420°, using the Rabattement Surface incorrectly results in a bevel angle of 41.75758°. The difference in these bevels angles is small enough not to be concerned about. However, the difference at the peak of the rafter would cause the rafter not to fix correctly. 48.43580° --> 52.33260°



The best way to layout a stereotomic view of the offset jack rafter plumb to the earth is to use Orthographic projection in plan view using the  offset jack rafter run line and slope line developed from the slope of the profile. The offset jack rafter plumb to the earth and the offset common rafter plumb to the earth (Prow Rafter) should be developed using the same method used for drawing out the stereotomic view of a hip rafters.  



Tuesday, April 9, 2013

Traditional Layout Using the Rabattement Surface


Traditional Layout uses the Rabattement Surface to layout an Stereotomic (3D) view of an rafters in a 2D space/plane. There are a few French and German books showing and explaining how to draw out the  Stereotomic view of the rafter, but nothing in English. This article is an attempt to explain the  Rabattement Surface used in Traditional Layout in English.

Rabattement Surface = Folding Plane or Folding Surface

The first concept that needs to be understood, is drawing the Profile View of the layout. The layout of the Profile View is critical to the rest of the layout. All lines in the drawings are either perpendicular lines or parallel lines. With only a few exceptions.

In the profile view you draw the elevation of the roof above the plan view. You should leave a drawing buffer between the plan view and elevation view for clarity.  The seat line of the rafters in plan view and on the Rabattement Surface are established by drawing a perpendicular line to the profile rafter from A1 to A2. Then swing an arc from center point G  from A2 to A3 using the radius length equal to G -A2. This will establish the seat line on the Rabattement Surface. Swing an arc from B2 to B3 using the radius equal to G-B2. This establishes the ridge cut line on the Rabattement Surface.



In plan view draw a perpendicular line at the end of the hip rafter equal to the rise (G1-S1) in elevation. This establishes the hip rafter triangle(H1-H2-H3). See my article on Hip Rafter Offset  to draw out the hip rafter in plan view.

Next, drop perpendiculars from A1 to A and A3 to C. These lines establish the seat lines and the internal\lower plane of the rafters on the Rabattement Surface. Line AC establishes the Internal Edge of Hip Rafter on Rabattement Surface. 





Here's an example of dropping perpendiculars from  a jack rafter on the Rabattement Surface to establish the bevels angle cuts on the edges and sides of the jack rafter. 












The Rabattement Surface is two planes. The tops of the rafters and the lower edges of the rafters. 





This next drawing shows how to locate the seat of the jack rafter at the hip rafter. Continue the seat line in plan view to the center line of the hip rafter, point H. From point H draw a line perpendicular to the hip line in plan view. It will intersect the plan view at point I. From I draw a line parallel to the hip rafter line on the Rabattement Surface. It will intersect the jack rafter on the the Rabattement Surface at L1 & L2. Drop perpendiculars from L1 & L2 to the Stereotomic view of the jack rafter.  


The perpendiculars from L1 & L2 will intersect the bottom two edges of the jack rafter. From J1 draw the seat line to J3 and from J2 to J4 draw the other side of the seat line. 



Thursday, April 4, 2013

Saint Andrew's Cross using Devers de Pas

Saint Andrew's Cross using Devers de Pas on an Hexagonal ground plan.
Offset Crossing Jack Rafters Plumb To The Roof Surface.
Or
Crossing Purlin's.












Saint Andre's Cross using the Rabattement Surface.





Cross Jack Rafters Plumb To the Roof Surface using the Rabattement Surface.