Readers ask: How Thick Plywood For 24″ Joists?

Can floor joists be 24 inches on-center?

24″ o.c. You can always use bigger lumber, closer spacing, or a smaller span; just don’t go smaller, further apart, or a longer span. In other words err on the side of caution rather than pushing the envelope.

What thickness of plywood is used for subflooring?

The minimum thickness of plywood for subflooring is about 5/8 inch. Since it does not hold fasteners as well as plywood, OSB must be a little thicker, or at least 23/32 inch. There are several factors that determine what subfloor thickness is optimal for added benefits like insulation.

What size plywood is used when the joists are 16 apart?

The recommended thickness of the plywood subfloor is governed by the spacing of the joists. Some experts suggest that 15/32-inch plywood should be standard if the underlying floor joists are spaced 16 inches apart or less, but slightly thicker 3/4-inch plywood should be used for joists spaced further apart.

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How far can you span 1 2 plywood?

Maximum span 24 inches for 15/32-and 1/2-inch panels.

How far can a 2×6 joist span without support?

2-grade 2×6 joists can span up to 10 feet 9 inches from beam to beam when spaced the standard 16 inches apart with a maximum live load of 30 inches per square foot. In comparison, No. -1 grade lumber can span slightly further to 10 feet 11 inches under the same parameters.

Should floor joists be 16 or 24 on Center?

The vast majority of floor joist systems are built with 16″ OC (on center) spacing. It is possible to build with wider spacing. While 3/4″ material on 24″ OC joists may be “to code” in your area, I think that you will find such construction to be noisy and springy.

What is the best plywood for underlayment?

Poplar or Birch Plywood with a fully sanded face and exterior glue. Lauan Plywood, when used as an underlayment, should be Type 1 (Exterior). The best grade is BB and the next best is CC, while OVL (overlay grade) is the minimum acceptable face grade. There is a wide variety of quality and species classed as lauan.

Is it better to use OSB or plywood for subfloor?

The National Tile Contractors Association and the Resilient Floor Covering Institute both recommend plywood for subflooring and underlayment, because it doesn’t have the risk of swollen edges that OSB does. Plywood also has a slight advantage in stiffness, which means that subflooring panels need not be quite as thick.

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Do you nail or screw subfloor?

Using code-approved screws rather than nails is the best option for avoiding movement. If using nails for subfloor installation, stick with ring-shank nails; smooth nails may withdraw easier, leading to squeaks.

Should I use 2×4 or 2×6 for shed floor?

What Size Floor Joist Do I Need? The most common option for your floor joist is your standard 2×6. A 2×8 will provide a few additional benefits and have some advantages, but overall, the 2×6 is the most commonly used and budget-friendly option for constructing your shed floor.

Can I use 2×4 for floor joists?

you don’t use 2×4’s for floor joists.

What is the strongest 1/2-inch plywood?

If you ever wondered “what is the strongest plywood?” The answer is Marine plywood. It is the strongest and toughest of all plywood on the market. It is bonded with high-quality glues to make the plies structurally solid and resistant to moisture.

How far will 3/4 plywood span?

The longest recommended span between wall supports for 3/4-inch-thick plywood shelves is 36 inches.

Can I use 1/2-inch plywood for shed floor?

Use 1/2-inch pressure-treated plywood in a light-duty shed. For basic storage of hand tools such as rakes, shovels, trimmers and others, 1/2-inch pressure-treated plywood as a shed floor will be sufficient.

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