Archive for the ‘floors’ tag
concrete design strength
Why concrete under a highway over pass intended as a package of I?
Is it the air or force? What is the difference between a beam shape and I served as a thick concrete slab of fat? I guess that's the strength, but do not know why.
Yes is that the maximum intensity with minimum material. Why? In a cargo floor, the top layer is compressive, while the lower layer takes the tension. The middle layer is relatively weak and would be a loss for a lot of concrete here. Concrete is very good compression, but the maintenance is relatively low blood pressure. The son of steel, which have the same coefficient of thermal expansion of concrete, are placed in the lowest layer of the beam I to improve resistance a tensile strength of this layer. Long stretches factory pre-cast beams the son of the layer of steel are pre-stretched layer actually move any voltage from center to the bottom of the wheelbase I. This steel girder downloaded pre-stretch curve slightly upward, producing two results: (1) the top layer of the compression load the concrete bottom of the qualification for a higher payload, and (2) geometrically attenuating the low rate of displacement per unit load floor useful to reduce the amplitude of vibration.
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