In my course it's preferred not to hatch ribs and webs so should I consider a stiffener like them and not hatch it or is it different and why ?

  • $\begingroup$ How is this part being manufactured? If it's anything other than 3D printing it will be very difficult, and even then there will be issues with overhangs and/or support removal unless it's a powder-based process... $\endgroup$ Commented Dec 27, 2021 at 12:36
  • $\begingroup$ @JonathanRSwift I think this is just an exercise for developing drawing skills. $\endgroup$
    – NMech
    Commented Dec 27, 2021 at 19:56
  • 1
    $\begingroup$ The primary function of a drawing is to make it clear how to manufacture a part, though... Even if it's not relevant to the question, it's still a useful thought for a learner to ponder! $\endgroup$ Commented Dec 28, 2021 at 9:27
  • $\begingroup$ I managed to dig the relevant standards. BS 8888 & BS ISO 128-44 states that ribs should not be hatched ( just like your target said). $\endgroup$
    – NMech
    Commented Jan 1, 2022 at 22:00

1 Answer 1


The standard is that The cylinder part should be hatched but not the rib.

So something like the following.

enter image description here


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