<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by EngineerMike:
...... but there could be an actual order-of-sequence element to the mechanism. </div></BLOCKQUOTE>
There is. Each rung latch releases as the rung above it collapses down into the tube. If you extend from the top, the latches don't fully engage. That's the biggest issue with the ladder. If you give it to someone who doesn't know how to use it (or doesn't like to read warning labels

) problems can occur. If you extend it properly and keep the ladder reasonably vertical to keep any side loads from stressing the hollow aluminum tubes, it's a pretty slick ladder.