Are the arms slightly angled to keep pipe from rolling off?

Hello! Yes, the "arms" on the Storage Rack are slightly angled. However it would depend on the size of pipe and how they are stacked, whether they will stay on the rack. Larger pipe or conduit may not work well on the rack as the tilt in the "arms" isn't great enough. I trust this helps. For further inquiries, you can chat with us on our website (BoraTool.com), send us an email to info@affinitytool.com, or call us at 248 588 0395. Thank you!