- How Much Weight Will A 4x4 Hold
- How Much Weight Can A 4x4 Support Vertically
- How Much Weight Can A 4x4 Bear
The span of a beam is dependent on a few variables. The species of lumber, size of lumber and the load it carries. Fewer posts on upper level decks are typically more desirable to the occupants and this drives the use of larger framing materials for longer spans. Beam span maximums are based on a maximum anticipated live load. Building codes for residential decks only require 40 psf.
The longer the joist, the more area of deck the joist supports, and thus the beam supports. For pressure-preservative-treated southern pine no. 2 grade, there is a method that can be used for estimating beam spans for a preliminary design. 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 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on.
How much weight can a 2×4 support horizontally? In this case, it is important to consider the position of the load. Is it an even load or just a point load? For example, a 10-foot 2×4-inches frame with an even load of 40 pounds would have a maximum bending moment of 1000 feet pounds. 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 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on. Dimensional Lumber Deck Beam Span Chart. The numbers in gray indicate the distance between the support posts. . 4x4 through 12x12. Incised 4x4 and 4x6 In a wood structure, whether it is a deck or a five-story wood frame building, solid wood columns (posts) are often used. These columns are subject to axial compressive loads, and in some cases, eccentric loads. How much weight can a 2×4 support horizontally? In this case, it is important to consider the position of the load. Is it an even load or just a point load? For example, a 10-foot 2×4-inches frame with an even load of 40 pounds would have a maximum bending moment of 1000 feet pounds. The calculator below can be used to calculate the support forces - R 1 and R 2 - for beams with up to 6 asymmetrically loads. For a beam in balance loaded with weights (or other load forces) the reactions forces - R - at the supports equals the load forces - F.
How Much Weight Will A 4x4 Hold
Dimensional Lumber Deck Beam Span Chart
The numbers in gray indicate the distance between the support posts. Numbers in blue are joist spans ( beam to beam or house to beam)
How Much Weight Can A 4x4 Support Vertically
| Joist Spans | ||||||||
|---|---|---|---|---|---|---|---|---|
| Species | Size Beam | 6' | 8' | 10' | 12' | 14' | 16' | 18' |
| Southern Pine | 2-2x6 | 6'-8' | 5'-8' | 5'-1' | 4'-7' | 4'-3' | 4'-0' | 3'-9' |
| 2-2x8 | 8'-6' | 7'-4' | 6'-6' | 5'-11' | 5'-6' | 5'-1' | 4'-9' | |
| 2-2x10 | 10'-1' | 8'-9' | 7'-9' | 7'-1' | 6'-6' | 6'-1' | 5'-9' | |
| 2-2x12 | 11'-11' | 10'-4' | 9'-2' | 8'-4' | 7'-9' | 7'-3' | 6'-9' | |
| 3-2x6 | 7'-11' | 7'-2' | 6'-5' | 5'-10' | 5'-5' | 5'-0' | 4'-9' | |
| 3-2X8 | 10'-7' | 9'-3' | 8'-3' | 7'-6' | 6'-11' | 6'-5' | 6'-1' | |
| 3-2X10 | 12'-9' | 11'-0' | 9'-9' | 8'-9' | 8'-3' | 7'-8' | 7'-3' | |
| 3-2X12 | 15'-0' | 13'-0' | 11'-7' | 10'-6' | 9'-9' | 9'-1' | 8'-7' | |
Douglas Fir-Larch, Hem-Fir, Spruce-Pine-Fir, Redwood, Cedars, Ponderosa Pine, Red Pine | 3X6 OR 2-2X6 | 5'-2' | 4'-5' | 3'-11' | 3'-7' | 3'-3' | 2'-10' | 2'-6' |
| 3X8 OR 2-2X8 | 6'-7' | 5'-8' | 5'-1' | 4'-7' | 4'-3' | 3'-10' | 3'-5' | |
| 3X10 OR 2-2X10 | 8'-1' | 7'-0' | 6'-3' | 5'-8' | 5'-3' | 4'-10' | 4'-5' | |
| 3X12 OR 2-2X12 | 9'-5' | 8'-2' | 7'-3' | 6'-7' | 6'-1' | 5'-8' | 5'-4' | |
| 4X6 | 6'-2' | 5'-3' | 4'-8' | 4-3' | 3'-11' | 3'-8' | 3'-5' | |
| 4X8 | 8'-2' | 7'-0' | 6'-3' | 5'-8' | 5'-3' | 4'-11' | 4'-7' | |
| 4X10 | 9'-8' | 8'-4' | 7'-5' | 6'-9' | 6'-3' | 5'-10' | 5'-5' | |
| 4X12 | 11'-2' | 9'-8' | 8'-7' | 7'-10' | 7'-3' | 6'-9' | 6'-4' | |
| 3-2X6 | 7'-1' | 6'-5' | 5'-9' | 5'-3' | 4'-10' | 4'-6' | 4'-3' | |
| 3-2X8 | 9'-5' | 8'-3' | 7'-4' | 6'-8' | 6'-2' | 5'-9' | 5'-5' | |
| 3-2X10 | 11'-9' | 10'-2' | 9'-1' | 8'-3' | 7'-7' | 7'-1' | 6'-8' | |
| 3-2X12 | 13'-8' | 11'-10' | 10'-6' | 9'-7' | 8'-10' | 8'-3' | 7'-10' | |
How Much Weight Can A 4x4 Bear
Assumes 40 psf live load, 10 psf dead load, L/360 simple span beam deflection limit, cantilever length L/180 deflection limit, No. 2 Stress grade, and wet service conditions.