60,000 = 0.135 in.2 Av,provided = 0.4 in.2 > 0.135 in.2

required, but provide the same stirrups as elsewhere

Figure 7.16. Schematic shear reinforcement.

Use #4 two-legged stirrups at 9 in. near the supports. A reduced spacing of stirrups equal to d may be used within the span where the calculated shear stress vu < vc/2. See Fig. 7.16 for placement of shear reinforcement.

ACI 318-02. Vu at a distance d from the support = 4.48(15 - ) = 60 kips

i-JL = 0.75 x — = 16.9 kips 2 2

Since Vu = 60 kips exceeds

0Vl 2

= 16.9 kips, stirrups are required.

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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