The vertical ladder is an absolute no no in a lab environment --- wherever
I know of their use their have been problems - whether for access to
rooftop hazzards labs etc. Try carrying samples on vertical ladders,
samples get dropped or more frequently the chemist trying to keep from
dropping the sample falls --- ipso facto - a broken leg. (Real examples
from labs I have worked in in the past)
A proper stairway is required.
Jack Martin Miller
Professor of Chemistry
Adjunct Professor of Computer Science
Brock University,
St. Catharines, Ontario, Canada, L2S 3A1.
Phone (905) 688 5550, ext 3402
FAX (905) 682 9020
e-mail jmiller@sandcastle.cosc.brocku.ca
http://chemiris.labs.brocku.ca/staff/miller/miller.html