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32 feet.
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What is a truss on a truss bridge?
A truss is a diagonal brace which provides structural support for a bridge span by extending between a vertical member and the bridge span.
How long are truss bridges?
the longest span of a truss bridge is 2.1 miles long
When was Double-Span Metal Pratt Truss Bridge created?
Double-Span Metal Pratt Truss Bridge was created in 1877.
What is the bridge span of a truss bridge?
what is the regularly span of a arch bridge
What is the typical span for the K-truss bridge design?
There is a 1300 foot long K-Truss Bridge in Alaska.Alaska is the youngest state to implement the usage of K-trusses, as five bridges were built along the two main highways (Parks and Richardson) with the longest being a three-span 1300-foot bridge near - See more at: http://thebridgehunter.areavoices.com/2013/06/14/k-truss-bridge/#sthash.uVmDjyu2.dpuf Alaska is the youngest state to implement the usage of K-trusses, as five bridges were built along the two main highways (Parks and Richardson) with the longest being a three-span 1300-foot bridge near - See more at: http://thebridgehunter.areavoices.com/2013/06/14/k-truss-bridge/#sthash.uVmDjyu2.dpuf Alaska is the youngest state to implement the usage of K-trusses, as five bridges were built along the two main highways (Parks and Richardson) with the longest being a three-span 1300-foot bridge near - See more at: http://thebridgehunter.areavoices.com/2013/06/14/k-truss-bridge/#sthash.uVmDjyu2.dpuf
What is the main purpose of truss bridges?
to hold more weight and to span more distance
What size you beam is needed to span 40 feet if used only for roof support?
It depends on the roof load and the actual clear span. Off hand, I would guess htat you haven't given this much thought. A rule of thumb for a steel truss is one inch per foot of span or in your case 40 inches. If you want to use a steel I-beam, you can get that from a good municipal library from the steel beam institute, but you are going to need a crane to place it. Dieter in Cincinnati
What size lumber would be recommended for the bottom chord on a truss to span a 30 foot clear span pole barn with a osb board and asphalt shingle roofing?
Trusses are engineered components of a building, based on live loads, pitch, span, spacing, other loads that may be placed within the trusses, like attic storage, etc. If you're building to code and with a permit and will be inspected, you will need to present the engineering sheet that comes with a truss order. If you are building them yourself,(which is not legal in most jurisdictions anymore), you should at least work from a set of pre-engineered truss plans. The Extension Service, serving most counties in America, used to offer a book with an assortment of truss plans. I don't know if it is still available. You will find, however, that to build your own trusses you will invest more in nails and gusset material and lumber than it would cost to have them built by a truss plant. As to the size of the bottom cord on a 30' span, they can be sized from 2 X 4 up to 2 X 12, or even greater if they are timber trusses or will be used to support loads such as an overhead trolly. But each truss itself is a set of components all working together to achieve the desired strength, with the bottom cord being just one of those components. And the spacing and bracing of trusses to each other is of equal importance to achieve adequate strength in the building.
What is an advantage of a truss bridge?
well now a days truss bridges are not in use oftenly cause they need great maintenance works truss bridge only gives advantage to short span way it cannot be use in a big way
What is a distance between the supports of a bridge?
the span
What size laminated timber beam is needed for a 23 foot clear span under a 15 foot roof in between load bearing walls -?
38 feet longIt is not possible to give a definite answer without more detail. The construction and type of roof will determine the load (weight) bearing on the beam, and factors such as wind load and earthquake load, and the way the roof bears on the beam (truss/point load/distributed load) will all affect the sizing.
What size laminated timber beam is needed for a 23 foot clear span under a 15 foot roof in between load bearing walls?
38 feet longIt is not possible to give a definite answer without more detail. The construction and type of roof will determine the load (weight) bearing on the beam, and factors such as wind load and earthquake load, and the way the roof bears on the beam (truss/point load/distributed load) will all affect the sizing.
