# Quick Answer: How To Build A Floor For A House?

## How is a House floor constructed?

Though some floors are built on a concrete slab flat on the ground, most floors are raised above the ground. A raised floor is constructed with a wooden framework that bridges from one exterior wall to another. This framework may or may not be supported intermediately by girders, beams, or walls.

## How far apart should floor joists be?

Normally, floor joists are spaced 16 inches apart on center. This means from the center of one upright joist to the center of the next. Given that 2x8s are actually 1-¾ inches wide, it works out to be 14-¼ inches between each joist. With some structures, floor joists are required to be 12 or 24 inches apart on center.

## What holds up a floor?

Joists are the cross-beams that make up the frame of the floor and sit atop the foundation of the house. On higher floors of a house, the joists hold up the higher floors, acting as the skeleton underneath.

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## What is under the floor in a house?

The subfloor is the thick flat surface on which all other layers rest. The subfloor is the bottom-most layer and it rests on the joists. If you have a concrete slab floor, the slab may be considered the subfloor.

## Are 2×6 OK for floor joists?

How do I keep them even? 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. 2×6 joists should only be used on ground-level decks that do not require, and will not provide for, any guards.

## How far can a 2×6 floor 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.

## Can I drill a 2 hole in a 2×8 floor joist?

You can drill the holes anywhere along the length of the joist (first photo). If you have manufactured I- joists, you can drill holes up to 1-1/ 2 in. diameter almost anywhere in the web area (the area between the flanges). Just stay 6 in.

## How do you build first floor of house?

1. Step 1: Square the Sill Plate Layout on the Foundation.
2. Step 2: Cut, Drill and Attach the Sill Plates.
3. Step 3: Build Basement Bearing Walls – Where Necessary.
4. Step 4: Layout the Joist Spacing on the Sill Plates.
5. Step 5: Attach the Rim Joists.
6. Step 6: Cut and Install the Floor Joists Between the Rim Joists.
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## What goes on top of floor joists?

Plywood, hardboard, and cement board are common choices, but sometimes the underlayment is simply a thin foam padding. Subfloor: This layer of OSB or plywood is part of the home’s construction and will already be in place when the underlayment and floor covering is installed.

## What is a floor framing?

The basic types of floor framing are Platform (building one story/level on top of another) and Balloon. Of these two methods, Platform Framing is used more extensively because it is easier, faster and safer. Box Sill Construction. A method of floor construction that requires. headers be attached to the ends of the

## What size wood do you use for floor joists?

Lumber graded as #2 is the most common choice for floor joists and other framing lumber.

## Can I use 2×4 for floor joists?

Either way, 2x4s as deck joists are safe as long as your design doesn’t span too far or include guard rails or stairs. The other main limitation is the size of your deck. 2x4s are the smallest dimensional option, making them great for low, ground-level decking if they’re spaced no further than 12” on center.

## Should I use 2×4 or 2X6 for shed floor?

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.