How do I know if my house has a balloon frame

In a balloon frame, the 2nd story subfloor is held up on the edges by a ledger board instead of resting on the top plate in a platform frame. If you look around the edges of the 2nd story subfloor or attic subfloor in a balloon frame house, you’d be able drop a penny down to the basement in the stud bay.

Is balloon framing still used today?

Balloon framing is no longer used today, Stack said. It has been replaced by a style called platform framing, which eliminates the problem of void spaces that comes with balloon framing, he said.

What are the disadvantages of balloon framing?

The two major cons of balloon framing are that long studs are less efficient to erect then shorter ones used in platform framing and the continuous spaces between studs act as chimneys during a fire, unless closed off with a fire-stop.

Is balloon framing better?

The main advantage balloon framing has over platform framing is the increased wind load strength. The roof structure tied to the sole plate by the continuous studs make balloon framing very popular in hurricane-prone areas. Balloon frame structures also have less settling than platform framing as a result of shrinkage.

Are there load bearing walls in balloon framing?

Floor members would then span between the beams, and walls would be infilled using rubble, mud, brick, or stone. Crucially, the walls were non-load bearing – the weight of the structure was entirely supported by the timber frame. The balloon frame, essentially, eliminates the heavy timber frame.

When did balloon frame construction start?

Snow, invented the balloon frame in 1832 and revolutionized construction practice. Chicago architect John M. Van Osdel erroneously attributed the invention to Snow in 1883, and subsequent histories accepted the story.

What's a balloon frame house?

Balloon framing is a style of wood-house building that uses long, vertical 2″ x 4″s for the exterior walls. These long “studs” extend uninterrupted, from the sill on top of the foundation, all the way up to the roof. … Some also assumed this type of framing could only be used in utilitarian, box-like buildings.

What are the disadvantages of platform framing?

Other major cons to wood platform framing include its risk to homeowners’ health (wood plays host to mold and mildew that can make homes toxic) and a home’s longevity (the wood used in platform framing is subject to rot and termites that can compromise your home’s structural integrity, requiring major repairs down the …

What is the main difference between balloon and platform framing?

The central difference between balloon and platform framing is that the studs in a balloon frame extend from the foundation to the rafters, whereas in a platform frame, the studs are independent on each storey.

What is the platform frame construction method?

Platform framing (also known as western framing) is the most common framing method for residential construction where each floor of a pole barn or conventional building is framed independently by nailing the horizontal framing member to the top of the wall studs.

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Do exterior windows need headers?

Every exterior wall is holding up part of the roof (loadbearing) in almost every case. So generally all exterior windows need a header. Interior walls may or may not be load bearing and need a header.

When did they stop using balloon construction?

Balloon framing using a technique suspending floors from the walls was common until the late 1940s, but since that time, platform framing has become the predominant form of house construction.

Who invented the balloon framing?

Chicago architect John M. Van Osdel attributed the invention to Chicago carpenter George W. Snow in 1832. The Chicago History Museum and other scholars point out that Virginia carpenters in the 17th century — facing similar pressures to build fast — employed similar techniques.

What type of framing is most commonly used in housing?

The most common framing technique in modern residential construction is platform framing, in which each story is framed on top of the previous one. Builders will frame in one-story platforms of typically eight- or nine-foot-high stud walls resting on a subfloor—the platform.

What happens with fires in balloon frame buildings?

A fire in a balloon-frame building will be extinguished only if the fire is confined by cutting off the fire in all of the avenues of extension. A small fire in a cellar wall will quickly spread vertically to the attic.

Why is platform framing used instead of balloon framing?

A platform frame uses shorter lengths of lumber because each story of the building is built individually and placed on top of the one below. Shorter 2x4s cost less per foot than longer ones and the break between each floor created the much needed fire block not present in the balloon frame.

What are the advantages of platform framing over balloon framing?

Balloon framing has less vertical shrinkage from drying out of the wood, while platform framing is easier and safer to erect, uses shorter lengths of lumber for studs, and is automatically firestopped, for which reasons it has become the method of choice.

What are two advantages of platform framing?

• uses minimal amount of wood.
• smaller pieces of wood can be used.
• fire stopping does not need to be used (stud spaces are enclosed by floor platforms)
• very safe to construct (simple tools are used)
• requires less labor (low construction costs)

Are all exterior walls load bearing?

Almost all exterior walls are load bearing, but in some instances, especially in larger homes, interior walls can be load bearing as well.

How big can an opening be in a load bearing wall?

Any opening that’s 6 feet or less can have just one 2×4 under the beam. This creates a bearing point 1.5 inches wide. Any opening wider than 6 feet should have a minimum of two 2x4s under each end of the beam. CLICK HERE to get FREE & FAST BIDS from local bearing wall carpenters.

Do you need cripple studs?

Cripple Studs – short studs installed above a header or below a window sill or saddle. If the header is tall enough to reach the top plate no cripple studs are required.