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  2. Deck railing - Wikipedia

    en.wikipedia.org/wiki/Deck_railing

    The typical deck railing is generally built from pressure treated lumber. [14] Posts on a deck are also typically pressure treated wood and standard sizes are 4x4, 6x6, and 8x8. These posts give structural support to the railing assembly and are the most critical part for the safety of the guard rail assembly. [15]

  3. Guard rail - Wikipedia

    en.wikipedia.org/wiki/Guard_rail

    An example of a common residential guard rail (US) or handrail (Brit.) is a wood railing around a deck or patio. In the US this is typically built on-site from pressure treated lumber thus featuring a simplistic design of vertical baluster spaced every 3.5 inches (8.9 cm) demonstrating compliance with building codes (standards).

  4. Portal Bridge - Wikipedia

    en.wikipedia.org/wiki/Portal_Bridge

    The reason for the derailment was that a rail was 5 inches higher than it was supposed to be, and acted as a ramp. [13] [24] As a result of the derailment, the maximum speed on the bridge was lowered to 60 mph (97 km/h), [1] making the bridge a choke point for the entire Northeast Corridor. The cost of the derailment was estimated at $3.6 million.

  5. Wreck Lead Bridge - Wikipedia

    en.wikipedia.org/wiki/Wreck_Lead_Bridge

    The original Wreck Lead Bridge was a wooden swing bridge which was built in 1880, upon the construction of the present-day Long Beach Branch to Long Beach. [5] By the 1980s, it was in need of replacement, with its deck frequently being stuck & subsequently delaying train and/or boat traffic; the bridge was also vulnerable to flooding due to its low spans, which caused the swing bridge ...

  6. Eastern span replacement of the San Francisco–Oakland Bay ...

    en.wikipedia.org/wiki/Eastern_span_replacement_of...

    Engineering and economic analysis in 1996 suggested that a replacement bridge would cost a few hundred million dollars more than a retrofit of the existing eastern span, would have a far longer expected useful life (perhaps 75 to 100 years rather than 30), and would require far less maintenance.

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