Mysteries :  The Official GrahamHancock.com forums
For serious discussion of the controversies, approaches and enigmas surrounding the origins and development of the human species and of human civilization. (NB: for more ‘out there’ posts we point you in the direction of the ‘Paranormal & Supernatural’ Message Board). 
Welcome! Log InRegister
Jon Ellison Wrote:
-------------------------------------------------------
> Dr. Troglodyte Wrote:
> --------------------------------------------------
> -----
> >
>


[Image Restored]

> >
> >
> > Hello Jon Ellison; regarding the above image
> you
> > wrote:
> >
> > ”Not really as it isn't an arch.
> > It's a triangulated, opposed truss.
> > It functions dynamically in exactly the same
> way
> > as the trusses' in the other pyramids...”

> >
> > These comments are incorrect.
> >
> > The roof structure for this space is an
> > arch
. It is composed of segments of
> opposing
> > voussoirs. It is not a
> > “triangulated, opposed truss”; in that it
> does
> > satisfy the formulaic requirements for a truss:
> > m = 2n – 3,
> > where m is the
> > total number of members and
> > n is the total
> > number of nodes. It does not function
> > “dynamically” as a truss, for the same
> > reason.
> >
> >
> >
>

> >
> >
> >
> > Dr. Troglodyte
>

> How exactly does a Voussoir function as an active
> component within a true arch????
> How does a true arch function as opposed to a
> gabled arch???
> Are they the same?
> Are they different??


The ‘voussoir’ is a wedge shaped element utilized in load [force/thrust] transference. In the image below, lines of “thrust” are dashed:



Source


> What is the difference between a True Arch and a
> False Arch??


The ‘voussoired’ arch is a form of “true” arch; the ‘corbeled’ arch is defined as a “false” arch.


> What would happen if we were to remove the lower
> cross member from a triangulated truss??
> If the lower cross member of a truss were removed
> could it be compensated for in any other way
> therefore mathematically maintaining the
> structural integrity of the truss??
>


You would no longer have a ”truss”. Compensation of the horizontal chord member of a truss, that does not act in tension, negates its designation as a ”truss”.


> I look forward to your answers.
>
> I have corrected and completed your drawing.
>
>



You have “corrected” nothing. You have illustrated the compression of the diagonal members and the tension of the horizontal chord member. You have incorrectly illustrated the “reaction” force from the bearing nodes, as indicated in this modern wood truss image:



Source



Dr. Troglodyte


“Quis custodiet ipsos custodes?“ - Decimus Junius Juvenalis


“Numero, Pondere et Mensura“


Options: ReplyQuote


Subject Views Written By Posted
Mastaba of Shepsekaf 1353 Thanos5150 25-Oct-17 04:25
Quite the Mastaba...looks like walls can talk ;) 260 Racho 25-Oct-17 06:11
Re: Quite the Mastaba...looks like walls can talk ;) 192 Thanos5150 26-Oct-17 02:26
Why adapted/adopted 178 Racho 31-Oct-17 07:44
Re: Why adapted/adopted 294 Jon Ellison 31-Oct-17 09:25
Re: Quite the Mastaba...looks like walls can talk ;) 214 Barbelo 26-Oct-17 03:57
Gables v Arch 152 Barbelo 26-Oct-17 03:47
Re: Gables v Arch 174 Thanos5150 26-Oct-17 04:47
Re: Gables v Arch 170 Barbelo 26-Oct-17 05:12
Re: Gables v Arch 155 Thanos5150 26-Oct-17 05:39
Re: Gables v Arch 219 Barbelo 26-Oct-17 06:49
An Interesting Curve 183 Jon Ellison 26-Oct-17 23:20
Re: Gables v Arch 141 Thanos5150 27-Oct-17 00:34
Re: Gables v Arch 149 Barbelo 27-Oct-17 01:19
Re: Gables v Arch 153 Jon Ellison 27-Oct-17 01:36
Re: Gables v Arch 158 Jon Ellison 27-Oct-17 01:49
Re: Gables v Arch 137 Barbelo 27-Oct-17 02:05
Re: Gables v Arch 145 Jon Ellison 27-Oct-17 02:17
Re: Gables v Arch 146 Barbelo 27-Oct-17 02:27
Re: Gables v Arch 138 Jon Ellison 27-Oct-17 03:40
Re: Gables v Arch 149 Barbelo 27-Oct-17 05:22
Re: Gables v Arch 148 Jon Ellison 27-Oct-17 06:45
Gables v Arch vs Truss 184 Dr. Troglodyte 27-Oct-17 19:33
Re: Gables v Arch vs Truss 163 Jon Ellison 27-Oct-17 20:50
Re: Gables v Arch vs Truss 130 Jon Ellison 27-Oct-17 21:20
Re: Gables v Arch vs Truss 136 Jon Ellison 27-Oct-17 21:53
Re: Gables v Arch vs Truss 242 Dr. Troglodyte 27-Oct-17 22:47
Re: Gables v Arch vs Truss 146 Jon Ellison 28-Oct-17 07:34
Re: Gables v Arch vs Truss 303 Jon Ellison 28-Oct-17 07:53
Re: Gables v Arch vs Truss 149 Dr. Troglodyte 28-Oct-17 16:08
Re: Gables v Arch vs Truss 210 Jon Ellison 28-Oct-17 18:13
Re: Gables v Arch vs Truss 138 Dr. Troglodyte 28-Oct-17 16:07
Re: Gables v Arch 152 Thanos5150 27-Oct-17 21:40
Re: Gables v Arch 160 Origyptian 27-Oct-17 22:40
Re: Gables v Arch 217 Barbelo 28-Oct-17 00:01
Re: Gables v Arch 201 Origyptian 28-Oct-17 10:03
Re: Gables v Arch 173 Barbelo 28-Oct-17 10:56
Re: Gables v Arch 304 Origyptian 28-Oct-17 13:30
Re: Gables v Arch 138 Barbelo 28-Oct-17 19:57
Re: Gables v Arch 130 Origyptian 28-Oct-17 22:45
Re: Gables v Arch 146 Barbelo 28-Oct-17 23:05
Re: Gables v Arch 136 R Avry Wilson 28-Oct-17 23:48
Re: Gables v Arch 191 Corpuscles 29-Oct-17 00:51
Re: Gables v Arch 185 Origyptian 29-Oct-17 05:19
Re: Mastaba of Shepsekaf 173 Origyptian 27-Oct-17 02:31
Re: Mastaba of Shepsekaf 161 Thanos5150 27-Oct-17 22:18
Re: Mastaba of Shepsekaf 145 Origyptian 27-Oct-17 22:50
Re: Mastaba of Shepsekaf 146 Thanos5150 27-Oct-17 23:46
Re: Mastaba of Shepsekaf 252 DUNE 27-Oct-17 07:58
Re: Mastaba of Shepsekaf 149 Thanos5150 27-Oct-17 22:04
Re: Mastaba of Shepsekaf 146 DUNE 27-Oct-17 23:08
Re: Mastaba of Shepsekaf 308 Thanos5150 28-Oct-17 02:34
Re: Mastaba of Shepsekaf 278 Corpuscles 28-Oct-17 04:43
Re: Mastaba of Shepsekaf 153 Barbelo 28-Oct-17 20:06
Re: Mastaba of Shepsekaf 209 Thanos5150 29-Oct-17 02:03
Re: Mastaba of Shepsekaf 185 Origyptian 29-Oct-17 05:16
Re: Mastaba of Shepsekaf 279 Thanos5150 29-Oct-17 05:39
Re: Mastaba of Shepsekaf 227 Origyptian 29-Oct-17 14:09
Re: Mastaba of Shepsekaf 187 Thanos5150 29-Oct-17 16:39
Re: Mastaba of Shepsekaf 211 Origyptian 29-Oct-17 16:56
Re: Mastaba of Shepsekaf 163 Thanos5150 28-Oct-17 16:00
Re: Mastaba of Shepsekaf 148 Barbelo 28-Oct-17 20:26


Sorry, only registered users may post in this forum.