When the L/120 notation is specified, I understand how this applies for spans. How is this notation defined as it applies for cantilevers? Example: given a 10 ft beam, with a 6 ft span and 2 ft cantilevers on both ends. It has a uniform load and deflects 0.5" in the center and 0.25" at the ends. The deflection ratio for the span is 72"/0.5" = L/120. What is the deflection ratio for the cantilever? Is it 24"/0.25" = L/96? Or is it 72"/0.25" = L/288?
@FingerJam12
4 жыл бұрын
Is this equation divided by 2 for double beams?
@maradonasssssss
8 жыл бұрын
Hi, my house is made in steel frame and trapezoidal concrete slab on top. at areas of 5.5m span, the beams have deflected 1 or 2 cm. they are visible with a naked eye. is this normal? is this so simple or other factors are considered?
@peterowens290
5 жыл бұрын
No I'd say 2 cm is not normal. But hard to be more specific with the very limited info you provide. The controlling factors for deflection are one or more of these: Is it acceptable to the eye; is it reasonably vibration resistant when live loads like walking are applied. You could easily have a professional engineer check things out.
@lesliethurogood5821
4 жыл бұрын
and how to measure the deflection (accurately and economically) of the built floor would be really useful
@lsrbarros
2 жыл бұрын
Laser measurer, like bosch...
@shanthinibuilders6888
4 жыл бұрын
Hi,hi construct apart buildings , beam span 6m ,beam centerly cracked found 1mm ,it is normal
@bhs_742
9 жыл бұрын
John Tingerthal : I was expecting answer of Constant of denominator, i.e 360 or 240, on which basis it is calculated in codes ? FYI: All that I know it depends on whether u used WSD/ASD or LSD/LRFD that will allow "Allowable " value to plastic state or elastic state.
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