**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.

Also, How much weight can a 2×8 hold?

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.

In this way, How far can a 4×6 span without support? Obviously, the larger the beam, the greater the **distance** it **can span** between posts. A Redwood **4×6** beam should **span** no more than 6′ between **supporting** posts.

**27 Related Questions Answers Found**

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**How far can you span a 2×6?**

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. The larger the deck, the larger the joists.

**How far can a double 2×8 span?**

The current floor joists are 2×8 and span the 24 **feet**, but there is a wall mid way.

**Are two 2×6 stronger than a 2×8?**

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.

**Will a 2×6 hold a porch swing?**

Your joists should **2×6** or larger. Do not hang your **swing** from ceiling covering, like plywood or beadboard. If you cannot decide on whether the material **will** be sufficient, have a professional decide for you.

**Are two 2×4 stronger than one 4×4?**

Granted 4x4s when used vertically are still rather **strong** for most applications, but should never be used horizontally for something structural. Also remember and remind yourself (repeatedly, if need be ) that **two 2×4** is NOT dimensionally the same as **a 4×4**. In this case, **two** 2x does NOT equal **a** 4x.

**What size beam do I need to span 10 feet?**

When supporting joists that **span** 12 **feet** with no overhang beyond the **beam**, a double ply **beam can span** in **feet** a value equal to its depth in inches. A double 2×12 **beam can span** 12 **feet**; a (2) 2×10 **can span 10 feet** and so on.

**How much weight can I put on 2×10 floor joists hold?**

2,200 lbs.

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

**How much weight can a 2×8 hold?**

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 much weight can a 2×4 joist support?**

If there is no strong wind, a **2×4** measuring at least 8 feet **can support** at least 1,000 pounds vertically. Such calculations would **hold** if, for instance, the **load** is square.

**What is the maximum span of a 2×6 floor joist?**

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

Nominal Size (inches) | Joist Spacing Center to Center (inches) | Lumber Grade |

2 x 6 | 12 | 12′ – 6′” |

16 | 11′ – 4″ | |

24 | 9′ – 11″ |

**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.

**How far can a 2×6 ceiling joist span?**

**Joist** spacing of 24 inches is allowed for **spans** between 16 to 20 feet using 2-inch by 10-inch lumber of these three grades.

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

**How much weight can a 2×4 support** vertically? Assuming that the load is square and there is no wind, the average 8 feet **2×4** could handle around 1,000 pounds vertically. Of course, it’s wise not to push the material up to its limit, use brace and alike to secure the 2x4s whenever it’s needed.

**How do you size a beam?**

**Floor joists** are what, 16″ apart center to center? If **you** spread the **weight** across 3 **joists**, that puts only 100 lbs per **joist** (very doable). If **you** are worried about any potential sagging, **you can** further spread the **weight** across 2 bolts per **joist**, that is only 50 lbs per bolt (very doable).

**How do you size a beam?**

Rocket states a 2×4 **can** handle 18000 lbs of compression. Also that a **1×4** would handle half the load of a 2×4. So a stand **supported** vertically buy 5 1x4s could handle 45000 lbs of vertical load; WAY more than a fully loaded 156 gallon tank **will weigh**.

**How far apart should 2×6 rafters be?**

Builders aren’t bound by standard **rafter** spacing measurements. But they do tend to space **rafters** in one of several industry-standard increments, typically either 12, 16 or 24 inches **apart**.

**How much weight can I put on 2×10 floor joists hold?**

2,200 lbs.

**How strong is a 2×4?**

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 2×4 joist support?**

If there is no strong wind, a **2×4** measuring at least 8 feet **can support** at least 1,000 pounds vertically. Such calculations would **hold** if, for instance, the **load** is square.

**What is the weight of a 2x6x10?**

Looking at this table you will see there is a choice in the **size** of **floor joist** (2 X 6, 2 X 8, 2 X 10 or 2 X 12) and there is a choice in the **joist** spacing (12″, 16″ or 14″). The **floor joist** spacing is the distance between the centers of any two installed **joists**.

**How long can floor joists be without support?**

A live load of 60 pounds per square foot demands more **support** and shorter spans. Spaced at 12 inches, the **joist** may only span 16 feet 8 inches. At 16 inch spacing, 15 feet 2 inches and 13 feet 3 inches at 24 inch spacing.

**What size rafters do I need?**

Nominal Size | Spaced (o.c.) | Species / Grade ( 20# Live Load – No Finished Ceiling) |
---|---|---|

2″ x 8″ | 24 | 16-8 |

2″ x 10″ | 12 | 27-6 |

16 | 24-8 | |

24 | 21-3 |

**What size rafters do I need?**

Design a **beam** depth based on the rule of thumb for estimating the depth of manufactured **beams** which is to divide the span by 20. **Beam** depths are typically 5 1/2 inches, 7 1/4 inches, 9 1/4 inches, 11 1/4 inches, 11 7/8 inches, 14 inches, 16 inches, 18 inches, and 20 inches.

**Whats stronger 4×4 or 2×6?**

The single **2×6** is 68% **stronger** than the **4×4** for vertical loads as you describe. However, I caution you that it may be a good idea to have someone design this beam properly so the job is done right. If you’re willing to have a 4″ wide beam, why not create a double **2×6** beam, this will be 237% **stronger**!

**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.

**Are two 2×4 stronger than one 4×4?**

Granted 4x4s when used vertically are still rather **strong** for most applications, but should never be used horizontally for something structural. Also remember and remind yourself (repeatedly, if need be ) that **two 2×4** is NOT dimensionally the same as **a 4×4**. In this case, **two** 2x does NOT equal **a** 4x.

**How much weight can a 4×6 hold?**

2 and better (no loose or missing knotholes), then a **4×6** spanning 18′ **will** support about 105 lbs.

**What size are floor joists in residential construction?**

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 much weight can plywood hold?**

A 12-by-36-inch piece of 3/4-inch fir plywood can support up to **50 lbs**. without problems. Plywood strength drops when thickness diminishes. For example; a 12-by-36-inch piece of 1/4-inch plywood will only support about **5 lbs**.

**How much weight can a wood beam support?**

Looking at this table you will see there is a choice in the **size** of **floor joist** (2 X 6, 2 X 8, 2 X 10 or 2 X 12) and there is a choice in the **joist** spacing (12″, 16″ or 14″). The **floor joist** spacing is the distance between the centers of any two installed **joists**.