Cable-stayed bridge 3-span cable-stayed bridge, the loads from the main spans are normally anchored back near the end abutments by stays in the end spans. For more spans, this is not the case and the bridge structure is less stiff overall. This can create difficulties in both the design of the deck and the pylons. Examples of multiple-span structures in which this is the case include Ting Kau Bridge, where additional 'cross-bracing' stays are used to stabilise the pylons; Millau Viaduct and Mezcala Bridge, where twin-legged towers are used; and General Rafael Urdaneta Bridge, where very stiff multi-legged frame towers were adopted.
Pontoon (card game) D9 = doubling on 9–11 only) As all Australian casino Blackjack games have house edges greater than 0.5%, Pontoon is the superior of the two games. In general, casino staff and Blackjack players erroneously believe that Pontoon has a higher house edge than Blackjack, because the removal of the ten-spot cards creates a 2% disadvantage for the player. In Pontoon, the player can draw to "21" and win against a dealer Blackjack; this combined with "not-last-chance" doubling, forfeit, player "21" always wins, player Blackjacks always get paid at 3:2, and bonuses on certain hands, actually "overcompensates" for the 2% disadvantage.