return page history
α-wwwiki
::
history/modulor/20130810-084807.txt
editor : alpha [82.253.67.1] 2013/08/10 08:48:07 _h2 the modulor vs feet & inches _p Following the strange and complex (and unused) [[Modulor|http://ww3.ac-poitiers.fr/arts_p/b@lise14/pageshtm/page_7.htm]], this is a personal reflexion about usual dimensions based on simple "human" combinations of two values coming from the ancient days : the foot, (≠30cm) and the inch (≠2.5cm) ? _h3 the modulor {center {show {@ src="http://marty.alain.free.fr/risc/data/grains/echelles/modulor_1.jpg" height="150" width="600" title="Usual dimensions with Le Corbusier"}} {show {@ src="http://marty.alain.free.fr/risc/data/grains/echelles/modulor_2.jpg" height="150" width="600" title="Série Rouge et Série Bleue from Le Corbusier"}} {show {@ src="http://marty.alain.free.fr/risc/data/grains/echelles/modulo.jpg" height="150" width="600" title="Usual dimensions with the Imperial System ... and Alain Marty's 5%"}} {show {@ src="http://mamo.fr/wp-content/uploads/2013/04/modulor4-640x284.jpg" height="240" width="1000" title="Usual dimensions with Le Corbusier"}} } _p The "Série Rouge" and "Série Bleue" imagined by Le Corbusier follows the Fibonacci serie. Generating the numbers of [[Fibonacci|http://fr.wikipedia.org/wiki/Suite_de_Fibonacci]] is simple : {b F(n) = F(n-1) + F(n-2)} and this sequence has a remarquable property : the ratio of two successive Fibonacci numbers tends to the Golden Number : {pre Ø = (1+sqrt(5))/2 = {/ {+ 1 {{lambda (x) return Math.sqrt(x)} 5}} 2}, the root of x{sup 2} + x - 1 = 0 which is equivalent to (a+b)/a = a/b when a=1 and b=x : « two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to their maximum » } _p The [[pascal]] triangle generates the Fibonacci numbers through diagonal sums : {pre 1 -> 2 = 1+1 1 1 -> 3 = 1+2 1 2 1 -> 5 = 1+3+1 1 3 3 1 -> 8 = 1+4+3 1 4 6 4 1 -> 13 = 1+5+6+1 1 5 10 5 1 -> 21 = 1+6+10+4 1 6 15 15 6 1 -> 34 = ... } _p There are close relations between the pascal triangle and fundamental mathematics, physics and biologic laws, about equilibrium, minimum energy, and so on. The "Golden Rectangle" - whose sides are in the golden ratio - is considered as an harmonic figure. Playing with squares generates a beautiful "spiral curve" : {center {show {@ src="data/spirale-fibonacci.jpg" height="180" width="1000" title="Fibonacci Spiral in a Golden Rectangle"}} {show {@ src="data/tournesol.jpg" height="180" width="1000" title="Fibonacci Spiral in Nature"}} } _p Le Corbusier built the "Série Rouge" on the value 1.13cm which was supposed to be the umbilic's height of an "ideal" 6 feet heigth man. And he built the "Série Bleue" on the value 2.26cm (2*1.13cm) which is the height reached by his hand when the arm is raised up. Why not !! The goal was to have in hands a set of "magic" numbers which were supposed to help the conceptors. « It's a language for proportions which makes ugliness difficult and the beauty easy. » had said Einstein about The Modulor. _p Below is a subset of these numbers rewritten in an approximation of feet and inches. {pre {@ style="float:left;width:150px;margin:5px;"} FIBONACCI 1: 2/1 3: 3/2 5: 5/3 8: 8/5 13: 13/8 21: 21/13 34: 34/21 55: 55/34 89: 89/55 144: 144/89 233: 233/144 SERIE ROUGE sur m = 1.13cm * m Ø Ø Ø * m Ø Ø * m Ø m / m Ø / m Ø Ø / m Ø Ø Ø SERIE BLEUE with M = 2.26cm * M Ø Ø Ø * M Ø Ø * M Ø M / M Ø / M Ø Ø / M Ø Ø Ø } {pre {@ style="float:left;width:180px;;margin:5px;"} {/ 2 1} {/ 3 2} {/ 5 3} {/ 8 5} {/ 13 8} {/ 21 13} {/ 34 21} {/ 55 34} {/ 89 55} {/ 144 89} {/ 233 144} SERIE ROUGE {* 1.13 1.618 1.618 1.618} {* 1.13 1.618 1.618} {* 1.13 1.618} 1.13 cm {/ 1.13 1.618} {/ 1.13 1.618 1.618} {/ 1.13 1.618 1.618 1.618} {* 2.26 1.618 1.618 1.618} {* 2.26 1.618 1.618} {* 2.26 1.618} 2.26 cm {/ 2.26 1.618} {/ 2.26 1.618 1.618} {/ 2.26 1.618 1.618 1.618} } {pre {@ style="float:left;width:200px;;margin:5px;"} -> Ø = {/ {+ 1 {{lambda (x) return Math.sqrt(x)} 5}} 2} 1' = 30.48cm, 1" = 2.54cm ≠ 30cm ≠ 2.5cm ≠ 4.775 = 16' - 1" [{- {* 16 0.30} {* 1 0.025}}] ≠ 2.950 = 10' - 2" [{- {* 10 0.30} {* 2 0.025}}] ≠ 1.825 = 6' + 1" [{+ {* 6 0.30} {* 1 0.025}}] ≠ 1.125 = 4' - 3" [{- {* 4 0.30} {* 3 0.025}}] ≠ 0.700 = 2' + 4" [{+ {* 2 0.30} {* 4 0.025}}] ≠ 0.425 = 1' + 5" [{+ {* 1 0.30} {* 5 0.025}}] ≠ 0.250 = 1' - 2" [{- {* 1 0.30} {* 2 0.025}}] ≠ 9.575 = 32' - 1" [{- {* 32 0.30} {* 1 0.025}}] ≠ 5.900 = 20' - 4" [{- {* 20 0.30} {* 4 0.025}}] ≠ 3.650 = 12' + 2" [{+ {* 12 0.30} {* 2 0.025}}] ≠ 2.250 = 7' + 6" [{+ {* 7 0.30} {* 6 0.025}}] ≠ 1.400 = 5' - 4" [{- {* 5 0.30} {* 4 0.025}}] ≠ 0.850 = 3' - 2" [{- {* 3 0.30} {* 2 0.025}}] ≠ 0.525 = 2' - 3" [{- {* 2 0.30} {* 3 0.025}}] } _p The result is actually a set of numbers rather impredictibles and difficult to memorize and to use. And they are unused ! Note : contrary to Fibonacci, Le Corbusier had copyrighted his "discovery". Open Source didn't exist ! No regret. _h3 feet and inches _p Beside the Metric System, the Imperial System and the Modulor System, it appears that in the architectural domain, usual dimensions can be easily reached by a simple combination of feet and inches in the approximation {b 1 foot = 30.48cm ≠ 30cm} and {b 1 inch = 2.54cm ≠ 2.5cm}. Examples : _ul a seat : 45cm = 1.5' _ul a table : 75cm = 2.5' _ul a kitchen work desk : 90cm = 3' _ul a tall man : height 180cm = 6', idem for the width between fingers _ul a standard door's dimensions : 210cmx90cm = 7'x3' _ul ceiling's heights : 225cm = 7'6", 240cm = 8', 250cm = 8'4", 270 = 9' _ul a little room : 270cmx270cm = 9'x9' and a better one : 360cmx360cm = 12'x12' _ul passage unit : 60cm = 2' (which is also the step of the man who walks) _ul stairs formula : 2h+g in [60,65] : for g = 30cm = 1' h must be between 15cm = 0.5' and 17.5cm = 0.5' 1" _ul thickness of a standard plasterboard : 12,7mm = 1/2". Other thickness are 4/12" and 8/12". Two plasterboards makes one inch (1/2"+1/2"), and improve the acoustic behaviour of the partition. With two plasterboards with different thickness (4/12" + 8/12"), the frequencies of resonance will be different and the filter better. Thinking to this in the Metric System is very difficult, not in the Imperial System ! _ul ducts diameters 15mm = 1/2", 25mm = 1", ... 300mm = 12" _ul and so on ... _p So, with this simple set of "metricized" feet and inches : {b [30|2.5]}, it is possible to generate a serie of useful related values : {pre first downwards : 30 / 2 = 15 / 2 = 7.5 / 3 = 2.5 (or 1/2'=6", 1/4'=3", 1/12'=1") then upwards : 2.5 | 5 | 7.5 | 10.0 |12.5 | 15 | 17.5 | 20.0 | 22.5 | 25 | 27.5 | 30 and beyond that, for instance mixing with 15cm = 1/2' = 6" 45 | 60 | 75 | 90 | 105 | 120 | 135 | 150 | 165 | 180 | 195 | 210 |.. and also the metric series using 2" = 5cm or 4" = 10cm : 50 = 45 + 5 = 1.5'2", 100 = 90 + 10 = 3'4", ..... } _p All these values are easy to memorize and combine, and are compatible with the values coming from the Metric System (12.5, 25.0, 100, ...). This system coming with a ligth approximation of the true foot and inch makes the junction between the "Imperial System" and the "Metric System" in respect to the old measures of the ancient days ... _h3 the ancient days _p These considerations may seem ridiculously "Middle Age" and useless ! If so, why are the foot and the inch used in modern technologies such Computer Technologies ? The dimensions of a screen, of a pixel, of a font, of a page, are given in inches and not in centimeters. Is it only because of the predominance of the USA in these technologies, a country in which the Metric System didn't penetrated ? Whatever it may be, my experience as an architect confirmed the fact that it is a very good tool for conception in architecture, even if the dimensions are finally written in centimeters. In a lot of countries, the conceptual background of buildings dimensions is made of feet and inches. The Modulor was an attempt to fight against the Metric System, considered to be inappropriate in the building construction. But it was too complex, the Le Corbusier's "Série Rouge" and "Série Bleue" have never been easily used and so, they are not used. _p IMHO, I think that the idea of a "little smart modulor" made on gentle combinations of feet and inches could be seen as an acceptable and useful successor of the Modulor. And you ? _h3 architecture _p This "little modulor" can be applyed to architectural conception. As it can be seen more thoroughly here : [[RISC/GRAINS|http://marty.alain.free.fr/risc/?view=grains]]. _p The conception of the buildings shown below has been based on the simple set {b [30|2.5]}. As it can be seen on the 5 levels office building, the picture on the left shows a first draft drawn on a 30cm ≠ 1' grain, and the picture on the right shows a more precise step drawn on a 2.5c= ≠ 1" grain. Drawing with a pencil on a paper sheet or drawing with a mouse on a digital screen follows the same principle : "choose a grain according to the desired precision". The scale is irrelevant in this process, it can be 1/100, 1/50, 1/20 or even 1/1. It is notable that this process, traditional in free-hand drawing, can be transposed in the "Computer Aided Design". Rather than using a keyboard to position and dimension the elements of a drawing, the best grain (30cm, 2.5cm or another one) has to chosen according to the desired precision, i.e. the "grain" will be the GCD (Greatest Commun Divisor) of all the dimensions. The cursor's diplacements are constrained to finite steps and with the help of the mouse's feedback, precise drawings can be done easily, in a hand drawing style. An old drawing style transposed in modern tools ! {center {show {@ src="http://marty.alain.free.fr/risc/data/grains/immeuble/trame.jpg" height="180" width="1000" title="Using 30cm ≠ 1 foot / Alain Marty architect"}} {show {@ src="http://marty.alain.free.fr/risc/data/grains/immeuble/detail.jpg" height="180" width="1000" title="Using 2.5cm ≠ 1 inch / Alain Marty architect"}} {show {@ src="data/nyls_plan_coupe.jpg" height="190" width="1000" title="A small house composed on the 30cm ≠ 1' modulus, a very simple plan and section | Alain Marty architect"}} {show {@ src="http://marty.alain.free.fr/risc/data/grains/nyls/nyls_1.jpg" height="190" width="1000" title="The house, a pool and the Catalan Canigou mountain in the distance"}} } _p The set {b [30|2.5]} is one of several other choices. It could be : {b [52.5|2.5]}, as it is shown below for the project of temple based on big limestone blocs ([[Pierre du Gard|http://www.pierredupontdugard.com/]]) whose dimensions are H = 210cm ≠ 7', L = 105cm ≠ 3.5' ≠ 3'+6", E = 52.5cm ≠ 1'+9", or 4M/2M/1M with M = 52.5cm. The Sketchup 3D model has been easily and quickly built on this "grain" of 52.5cm. More can be seen [[here|http://ensam.wiki.free.fr/projetenchantier_20120206/?view=temple]]. {center {show {@ src="http://marty.alain.free.fr/risc/data/grains/temple/2_2_mix.jpg " height="130" width="1000" title="Project of a temple based on H:210/L:105/E:52.5 limestone blocs (Pierre du Gard)"}} {show {@ src="http://marty.alain.free.fr/risc/data/grains/temple/2_3_mix.jpg" height="130" width="1000" title="Project of a temple based on H:210/L:105/E:52.5 limestone blocs (Pierre du Gard)"}} } _h3 what about curves ? _p How can a strict orthogonal drawing system based on a grid be extended to more complex architectures. Brief replies here : [[RISC/POLES|http://marty.alain.free.fr/risc/?view=poles]]. _h3 and so what ? _p This page is written in alphawiki. A wiki is a collaborative tool, but first of all - {b provided the syntax allows it} - it is a tool for composing and coding web pages with a rich dynamic content. It's the goal of the lambdaway project whose alphawiki is the last child. _p More to see here : [[MOTS|http://marty.alain.free.fr/risc/?view=mots]].