747-8I’s New Escape Slides
The new 747-8I with the new Air Cruisers door 1 and upper deck escape slides deployed. The upper deck slides are a new unique patented design that features the arch tubes. Traditional slides use many large cross tubes and tension straps on the bottom of the slide to give it beam strength. Beam strength prevents the slide from buckling under the load of evacuating passengers. In this case the slide needs to hold several thousand pounds and not buckle. This slide is over 45-feet long.
(source: anonymous Boeing employee)