Williot diagram
Williot diagram
(OP)
Can someone please point me to a reference or example that describes how to use and construct a Williot or Williot Mohr diagram? I believe it is an osolete graphical method to determine the forces on truss members.
I came across a sketch of such a diagram on a set of wood truss drawings from the 1940's. It seems like a fairly simple method, I just can't seem to decode how it works. Any insight or hints would be great.
I came across a sketch of such a diagram on a set of wood truss drawings from the 1940's. It seems like a fairly simple method, I just can't seem to decode how it works. Any insight or hints would be great.






RE: Williot diagram
RE: Williot diagram
most of the hits were useless "stubs", the most promising was a text that'd cost about $40.
i might look up some of my olde books tonight (but there again, i might forget).
RE: Williot diagram
RE: Williot diagram
Take a look at any good text book for the Analysis of Statically Indeterminate Structures, pre 1970's, when the computer still wasn’t doing all our analysis for us. For example:
1.) “Statically Indeterminate Structures,” by Paul Andersen, Ronald Press Co.
2.) “Analysis of Statically Indeterminate Structures,” by J.I. Parcel & R.B.B. Moorman, Wiley & Sons.
3.) “Theory of Structures,” by S.P. Timoshenko & D.H. Young, McGraw-Hill Book Co.
And many others.
RE: Williot diagram
This doesn't mean I remember how to begin to make one... I just remember hating them.
RE: Williot diagram
Even more vaguely, I think that the Maxwell diagram is only applicable to determinate trusses. In effect it is a conjoining of the force polygons for each joint, in such a way that the force in each member appears only once in the overall diagram. The force vectors on the Maxwell diagram are parallel to their members, and of a length proportional to the force magnitude.
I have just de-dusted my yellowing copy of "Theory of Structures" by Timoshenko & Young. Cough. Cough. The notation system generally used in constructing a Maxwell diagram is "Bow's notation" (another arrow for your Google quiver). There is a good explanation of both the diagram and the notation in its Article 2.4.
RE: Williot diagram
From my reading i'd like to suggest getting Etabs or Risa.