Everyone differs on that one , but I'll go with 'span' .
A covered bridge is a timer-truss bridge. The bridge has a roof and siding which covers almost all parts of the bridge. Some famous covered bridges are the Buchfart bridge and the Hartland Bridge.
Hutchins Covered Bridge was created in 1883.
Bath Covered Bridge was created in 1832.
Longley Covered Bridge was created in 1863.
Shriver Covered Bridge was created in 1900.
Hillsgrove Covered Bridge was created in 1850.
Erwinna Covered Bridge was created in 1832.
Dimmsville Covered Bridge was created in 1902.
Warren Covered Bridge was created in 1890.
Worrall Covered Bridge was created in 1870.
Harra Covered Bridge was created in 1875.
Fischtner Covered Bridge was created in 1880.