can you build a porch 12 feet wide with a 3 foot cantilever

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Cantilever Deck Addition - Expert Tips for Building Decks

You will find out if a four foot cantilever requires using 2x10s or even 2x12s and whether they have to be spaced closer at say 12" centers. If you can extend the cantilever by adding joists of the existing size then you will save a lot of time and effort.

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Homes: What you can buy for $250,000 - CBS News

Homes: What you can buy for $250,000. The building was finished this year and has units that are for sale for the first time. It has 923 square feet of space, a front porch, fireplace

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The Architect - CBS News

The Habitat for Humanity home allowed for only 1,200 square feet in a two-story building. Binkley also had to fit the home into a narrow urban lot, but provide a covered front porch and a back yard.

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Demolition Of Old Bay Bridge To Take Years « CBS San Francisco

Contruction crews have erected twelve foot wide catwalks that connect to the San Francisco-Oakland Bay Bridge self-anchored suspension span's tower and crews will begin to lay the nearly one mile

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This Old House - Season 19 - TV.com

The final episode on the San Francisco project begins with a visit to the Marin County Civic Center, Frank Lloyd Wright's only government building.

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Deck Joist Cantilever & Overhang Rules Decks.com

The distance your joists can safely cantilever or overhang a drop beam is determined by the size of the joists, the wood type and grade of the lumber and the spacing between joists. Many building departments limit joist cantilevers to 24" maximum.

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How to Size a Beam to Hold a Porch Roof Hunker

Fill in the parts of the formula that are already known. L stands for the span of the beam, in feet. In the example, the beam spans the 10-foot width of the roof. The total load is 4,000 pounds. F stands for the beam's fiber strength in bending, which depends on the species of wood. For the initial calculation, F can be estimated at 1,000.

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Cantilevers in the 2015 Code Professional Deck Builder

A southern pine (2) 2x12 beam can span 8 feet when supporting joists spanning a maximum of 14 feet, and it can cantilever 2 feet beyond the posts on each side. With the allowable cantilever of the joists, this beam would support a deck 12 feet by 17 1/2 feet.

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What is a Cantilever and Why would Your Deck want one

The Building Code (IRC 2009 or IRC 2012) allows a 40 ½” cantilever for a live load of 40 pounds per square foot (psf); your engineer may allow more. Upgrade to 2×10 joists, and the Code says you can cantilever almost 5 feet.³

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