Re: 4 x 4 **floor joist** possible? You **can**‘t even **use** a **4×4** as a post for a deck any more, no way this would work or be allowed.

Also, How big of a beam do I need to span 20 feet?

**20**foot clearspan

**beam**size

In that case, you **need** something like a 12-16″ GLULAM or LVL to **span** the **20**‘ and can use simple 2×8-10 dimensional lumber 16″OC as floor joists.

In this way, Are two 2×4 as strong as a 2×8? What do you plan on doing for a door for the shop? In bending, a joist composed **of two 2×6’s** (true dimension 1.5 inches x 5.5 inches) are slightly **stronger than** a single **2×8** true dimensions 1.5 inches by 7.25 inches.

**22 Related Questions Answers Found**

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**How much weight can 3/4 plywood hold?**

**How much weight will a 4×4 beam support?**

In general, a 2Ã—4 wooden **beam can support** the **weight** up to a ton horizontally, and thus, a wooden **beam** of 4Ã—4 **can** easily **support** double of the **weight** mentioned above horizontally.

**What is the maximum span for a 2×4 Rafter?**

Maximum Span (ft – in) | ||
---|---|---|

Nominal Size (inches) | Rafter Spacing, Center to Center (inches) | Lumber Grade |

2 x 6 | 12 | 16′ – 4” |

16 | 14′ – 11” | |

24 | 13′ |

**What length do 2×4 come in?**

Because of this extra milling, a **2×4** no longer measures a full 2 inches by four inches. Instead, a **2×4** is really only 1 1/2″ by 3 1/2″.

**How much weight can a 2×6 support horizontally?**

The type of **load** in question **will** also determine **how much weight** a **2×6 can hold** on edge. For example, a 2×4 lumber may **hold** a 4-cylinder engine comfortably but may not **hold** a bigger one. On the other end, a **2×6 can support** a V8 engine of between 600 â€“ 700 lbs.

**Can I use 2×4 for floor joists?**

before being supported by a girder – then yeah, a **2×4** should be okay. **2×4** are suitable for ceiling **joists** where the LL is like 20 Lbs. If you got a good species with the highest Modulus of Elasticity and Best grade and **use** like 12″ o.c. – you might get 8” span.

**How far can you span a double 2×6?**

Joist Spans | ||
---|---|---|

Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine | 3X6 OR 2-2X6 | 5′-2″ |

3X8 OR 2-2X8 | 6′-7″ | |

3X10 OR 2-2X10 | 8′-1″ | |

3X12 OR 2-2X12 | 9′-5″ |

**How do I combine two 4×4 posts?**

**How much force does it take to break a 2×4?**

It would probably take over a thousand pounds to **break a 2×4** in half on its short length.

**How much weight will a 4×4 hold?**

What I figured if the **weight** is distributed evenly is that each **4×4** post is supporting a max of about 420 pounds.

**Is a 2×4 stronger on its side?**

**2×4 stronger**: on edge vs flat

2xs are always **stronger** on edge, consider how a header is constructed. Obviously **it’s** easier to drill thru the flat **side**. You might consider using both flat and on edge – connected together.

**How much weight can a 2×6 hold vertically?**

The type of **load** in question **will** also determine **how much weight** a **2×6 can hold** on edge. For example, a 2×4 lumber may **hold** a 4-cylinder engine comfortably but may not **hold** a bigger one. On the other end, a **2×6 can** support a V8 engine of between 600 â€“ 700 lbs.

**How do you extend a 2×4?**

**4 Answers**

- find a better lumber supplier. (Don’t know where you are, but you should be able to find a lumberyard nearby.)
- double the 2x4s. So the front will have 2-2x4s at 66″; put a 2×4 behind that butt joint (no plates/nothing else special) with 4′ on each side.
- for the top if you use sheet goods, you’ll need 2 sheets.

**How much weight can a 2×12 support horizontally?**

One 2×12 can support about **180 lbs**. per foot or about **2,100 lbs**.

**How long can a 2×4 span?**

some of it gets pretty technical in nature, and mostly relates to pounds / square foot of loading. 2x6s are generally used for ceiling joists, esp since you said 24″ oc and reallllly short spans only (5 or 6 feet ). Most **floor** loads would be a minimum of **2×8** @ 16″ oc and most preferbaly 2×10.

**How long can a 2×4 span?**

**Can you use 4×4 posts for a deck?**

In the past, many **decks** were built with **4×4** support **posts** (also called structural **posts**). But these **can** bow seriously, even if a **deck** is only 3 feet off the ground. For that reason, **we** strongly recommend that **you use** 6x6s instead, even if your building department **does** not demand them.

**How much weight can a single stud hold?**

A nail in just drywall can’t hold more than a few **pounds** of weight, but a thin nail in a wood stud can typically hold up to **20 pounds** and several coarse threaded wood screws in wood studs can typically hold up to **100 pounds** or more.

**How much weight can a 2×6 ceiling joist hold?**

Fine Homebuilding notes that 2-inch by 6-inch garage **joists will** support a **weight** of up to 50 pounds per square foot. If you overload your garage’s **ceiling joists**, the **ceiling** may appear to sag from the strain.

**How much weight can a 2×4 truss hold?**

The dead **load** on the bottom chord of a **truss** varies with the **weight** of materials attached to it, such as drywall on the ceiling; a typical **load** is 5 and 10 pounds per square foot.

**Which is stronger 4×4 or 2×6?**

Maximum Span (ft – in) | ||
---|---|---|

Nominal Size (inches) | Rafter Spacing, Center to Center, OC (inches) | Lumber Grade |

2 x 6 | 12 | 16′ – 4” |

16 | 14′ – 11” | |

24 | 13′ |

**How much weight can 4 2×4 support?**

If there is no strong wind, a **2×4** measuring at least 8 feet **can support** at least 1,000 pounds vertically.

**How much weight can a 2×4 stud hold?**

Depending on the length of wall, a 2×4 wall could support 20,000â€“30,000**lbs**. This wall would obviously contain a lot of studs, but that is still a ton of weight.

**How much weight can a 2×4 stud hold?**

With a 20 pound dead load, max **span** for a **2×4** is 5 feet.

**How much force does it take to break a 2×4?**

It would probably take over a thousand pounds to **break a 2×4** in half on its short length.

**How far can a 2×4 span without support?**

In general terms, joists spaced 16 inches on center **can span** 1.5 times in feet their depth in inches. A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet.

**How strong is 2×4 wood?**

A 10 foot long **2×4** carrying a uniform load of 40 pounds per foot (400 lbs total load) will have a maximum bending moment at the center of the span of 1000 ft-lbs. The same 10 foot long **2×4** with a point load of 400 lbs at the center will experience a maximum bending moment of 500 ft-lbs.

**How much weight can a floor hold?**

For example, a properly designed office **floor can** support 50 pounds per square foot. This may seem light, but this is 50 pounds over each and every square foot of **floor** space.

**What is the maximum span for a 2×4 Rafter?**

In general terms, joists spaced 16 inches on center **can span** 1.5 times in feet their depth in inches. A 2×8 up to 12 feet; 2×10 to 15 feet and 2×12 to 18 feet.

**How much weight can a beam hold?**

If you have a **beam** of steel which has a basic permissible bending stress of about 23000 lbs per square inch, by the time you make allowances for the span and the lack of restraint, the actual bending stress that the **beam can** handle is down to about 6100 lbs per square inch under these conditions.

**How thick do floor joists need to be?**

Maximum Span (ft – in) | ||
---|---|---|

Nominal Size (inches) | Rafter Spacing, Center to Center, OC (inches) | Lumber Grade |

2 x 6 | 12 | 16′ – 4” |

16 | 14′ – 11” | |

24 | 13′ |