Rib patterns for plastic parts

what sort of plastic parts - extruded, injection molded, rotationally molded, ???

Don't know who you are, but there is plenty of imformation on the web ... usally plastic suppliers sites such as du pont. Batt

I've been using some technical recommendations from DuPont & BASF's design guide to design rib's dimensions (height, thickness, etc), for injection molding parts, however I can find engineering criteria to design the ribs pattern, I mean, ie. what are the benefits from a square rib pattern vs a honey comb one ?

I know that FEA may give me some inputs but I rather prefer to make my design using some criteria to avoid to expend in severals analysis as possible.

Dear dont know who you are, One's perception of where and what type and size of ribs are very dependent on the total design and how rigid the designer of the part is, and what freedom you have as a toolmaker where to put the ribs as the positioning of them may affect the flow of the material ... send to my email address ... gbatt@internode.on.net ... a sketch of what you are trying to do ... if that is not on, maybe 46 year's experience would help. Batt