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[HOW TO APPROACH THE STRUCTURAL SYSTEMS VIGNETTE]

May 6, 2012

Remember: decking is supported by joists, joists are supported by beams and beams are supported by columns. Simple, yes, but when you’re in a panic in the exam, this can ease the thought process. DO NOT CANTILEVER BEAMS

7. Now we have the covered entry left to draw.

Since we have two areas of beams in-between the covered entry, (In the red box above) the most efficient way to approach this solution is to span the joists between this entry. Keep in mind also that the span between these beams is 26’-0”, which is less than the 30’-0” maximum desired span length.

Yes the joists spanning east and west would carry more load, but this approach requires extra beams.

The last beam we add is between the covered entry and the common area. According to NCARB, a beam is required to carry a wall directly above it on the 2nd floor.

All we need to add are joists and the covered decking. No more beams or columns. Efficient.

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