![]() |
how to design a woven cable grid to support workers
how to design a woven cable grid to support workers
i have an interesting design request from a client. they would like to use a 2" sq. grid of cables to support workers within a large steel trussed ceiling space. i have worked on assuming one-way action of 6 cables and using simple mechanics of materials, i have found that someting like 83# creates a tension of 300+k for a cable span of 9 feet. does anyone have a f.e. program that can produce an output given that the mesh is: tension only, woven, not likely to be level when initially installed (minimal pretensioning), friction between the cables (woven). as a side note, i gave the cable an initial drape of 2" and the tension in the cable after being loaded was in the 300# range. let know if anyone has done this before.. -christopher look up roarks. there are tables in there giving the deflection and tension of a cable under point load. you then only have to decide how many cables take the load. 300k is too high, but 2" may be a bit low. the formulii in roarks will give you something more realistic. i would expect more like 300lb. another option is to have a continuous cable that has a pulley under each truss and is only fixed at each end. this will deflect more but will also avoid horizontal forces on the trusses. |
所有的时间均为北京时间。 现在的时间是 07:30 PM. |