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http://hebig.org/blog/003029.php http://hebig.org/blog/003029.php
by mixmax 17y ago
http://hebig.org/blog/003029.php http://hebig.org/blog/003029.php
- vl 17y agoNice detailed write-up. Couple additional details worthy of discussion: 1) Covers also can have hinges, so training of personal may be not even required. 2) It's unclear that round cross-section is the most convenient for humans to climb, after all humans in horizontal cross-section are like elongated ovals, so rectangular shape could be better. :)