https://www.beamcalculation.co.uk/
Beam Calculator - Steel Beam Calculations accepted by Building Control
The quick and easy way to get your steel beam calculations, accepted by Building Control Departments
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https://calcs.com/calculations/concretebeamrectangularusa
Rectangular Concrete Beam Calculator to ACI 318-14
Easily design and analyse rectangular concrete beams using ACI 318-14 standard using the ClearCalcs concrete beam calculator. With support for unlimited...
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https://engineeringcalculator.net/
WebStructural - Free Beam Span Calculator
Free Online Multi-span Beam Calculator
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