Floor Joist Blocking and Bridging: Compared - MellowPine (2023)

Floor joist blocking and bridging are methods to solidify a floor structure. Reinforcing connections are installed between joists to correct the bounce and wobble of a flooring system.

Blocking and bridging create a better weight distribution among all the joists and reduce the pressure on the joist.

What is Floor Joist Blocking?

Floor Joist Blocking and Bridging: Compared - MellowPine (1)

Floor Joist blocking refers to installing solid lateral supports between two adjacent floor joists to evenly distribute loads imposed on joists from the floor above. Lumber with the same width of the joist is used for solid blocking between joists at mid-span of joist or at a spacing, not more than 8 feet.

Blocking is done either in a straight line or staggered form.

These blocks, sometimes termed floor joist spacers, are installed between two adjacent joists perpendicular to the direction of the joists and are properly fastened with nails.

What does Joist Blocking do?

A joist is highly susceptible to horizontal and vertical movement in the absence of blocking.

A properly installed solid woodblock or floor joist spacer will distribute vertical loads across all joists. As a result, the movement of joists will be reduced.

These wooden blocks prevent floor bouncing by distributing weight evenly across all joists.

Lateral strength and floor stability can be increased by blocking the floor joist.

Pros

  • Reduces floor wobble
  • Installing process is easy and simple
  • Low-cost solution for floor movement.

Cons

  • Blocking may create a 'Hump' in the floor due to different drying rates of joist and blocking.
  • Require a high precision measurement to perfectly fit between joists.
  • Existing electric and plumbing ducts can make the installation process strenuous.

Joist Blocking Methods

A. Straight-line Joist Blocking

Straight-line blocking requires some expertise for correct installation. It is also good aesthetically, especially when the floor is exposed from the bottom.

This works best if you can cut the blocks into shapes first. With that, you can initiate your installation from one side for blocking joists.

Because the spacing between joists is often insufficient for a hammer swing, you will need to use a nailer.

Nails are the best option for blocking or bridging. When compared to screws, nails provide significantly greater resistance to shear forces.

Straight-line blocking provides one face of blocks for straight nail driving through joists.

Toe-nailing of blocks is required, however, to connect the second face of the block to the joist. Two nails should be driven at a 45-degree angle from both sides when toe-nailing.

Toe nailing reinforces the joints between joists and blocks. Consequently, straight-line joist blocking provides slightly more strength than alternate joist blocking.

B. Staggered blocking

In staggered joist blocking, also called altering, the blocking is laid asymmetrically.

This makes it ideal for unexposed floors.

In this method of joist blocking, you will get both faces for straight nail driving. No toe-nailing is required for staggered blocking of floor joists.

Most people prefer alternate blocking of joists because it is easier, faster, and requires less degree of expertise in comparison with straight joist blocking.

In case you want to perform altering, you have to simply draw a straight line across the joists. Now you have to place and fasten your blocks on either side of that line alternatively.

This will allow straight penetration of nails instead of toe-nailing.

Floor Joist Blocking and Bridging: Compared - MellowPine (2)

Joist Blocking Spacing

According to the International Residential Code (IRC), joists with dimensions less than 2”×12” (thickness× width) are exempt from blocking.

However, joists that are larger than this need blocking at a distance of not more than 8 feet.

Blocking at 4 to 6 feet is generally preferred by various contractors.

If you have an engineered floor joist or an I-joist, the floor joist bridging code of IRC recommends that you implement the manufacturer's instructions.

Alternatives to Joist Blocking to Reinforce a Floor

If you notice that your floor is not firm and has some bounce, you can use other methods to reinforce it.

Adding a sister joist is one of the options. In sister joisting, a second joist runs alongside the first joist and provides additional support and resistance to bounce.

The only disadvantage of the sistering of floor joists is that you will require more space to install a new joist.

Sometimes the structure beneath might be fine, but the subfloor could be causing issues in your structure.

Subfloor panels in old houses are prone to deterioration.

To rectify this issue, the best option is to lay a new plywood panel to replace the existing subfloor.

The new layer of plywood will add extra thickness and significantly reduce floor bounce.

You can also add a mid-span beam and some support columns to the joists. Placing a mid-span beam through half of your joists reduces the loads they were previously experiencing by half.

If you're planning to build a new home, then consider a floor truss instead of a joist if you can afford the higher initial investment.

Is Joist Sistering the same thing as Blocking?

No, joist sistering and joist blocking are not the same. In joist blocking, an extra wooden piece is installed perpendicularly between two adjacent joists.

This provides resistance against joists twisting which in turn reduces any bouncing of the floor.

In joist sistering, an additional joist is installed just adjacent to a joist that is damaged. It is an additional identical joist for adding additional strength to the existing joist to hold floor weight efficiently.

If there is a significant sag in the floor then various joists need to be sistered together.

Both joist sistering and joist blocking are popular ways to strengthen floor joists.

What is Floor Joist Bridging?

Joist bridging refers to a brace or combination of braces installed between floor joists to hold them tighly in place.Joist bridging is primarily used to improve the stability of a floor structure. These braces can be made of wood, metal strips, or strappings.

Floor Joist Blocking and Bridging: Compared - MellowPine (3)

Floor bridging prevents joist rotation, provides sufficient strength, and offers resistance against bounces to the floor when someone walks across it.

Due to joist bridging, each joist shares its loads with an adjacent joist. Consequently, the deflection of joists or floors can be reduced by up to 50%.

Bridging joists is accomplished by connecting the top of the joist's width with the bottom of the adjacent joist's width.

There are two main methods of joist bridging-solid bridging and cross bridging.

In solid floor bridging, a solid timber having equal depth to the joist's depth is installed between two adjacent joists.

This solid timber floor bracing should run perpendicular to the direction of the joist span. This is similar to straight-line joist blocking.

Joist cross bridging involves forming an 'X' shape with a couple of braces between two adjacent pairs of joists.

This type of bracing is also called as 'Herringbone struts.'

No building code in the USA recommends the standard size of wooden floor bridging.

Joist bridging sizes are adopted based on experience.

Different builders use different sizes of wood bridging.

But no matter how large or small, bridging is an efficient and effective counter for your wobbly or bouncy floors.

Bridging using galvanized steel connectors is now quite popular in the USA due to its low cost and longevity.

Among steel connectors, nailless connectors are preferred due to the simple installation process.

Floor Joist Blocking and Bridging: Compared - MellowPine (4)

If your floor already has joist bridging and is showing some bounce, you can add more rows of joist bridging on either side.

While bridging is effective in reducing bounce it's not as sturdy as a floor truss system. However floor trusses when compared to floor joists, are more expensive.

The existing joist bridging should be securely fastened with additional nails or screws.

Types of Bridging

A. Solid wood joist bridging

There are no specifications in any code on the sizes for solid wood bridging.

Normally, wooden strips of 1×2 or 1×3 are commonly used by builders for cross bracing. However, 1×4 strips are better because of the low splitting threat and affordable price.

A major challenge with solid wood joist bridging is precisely cutting every piece at the same angle.

You may have to change the cutting angle of the first and last bay of the joists to make it fit correctly.

Floor Joist Blocking and Bridging: Compared - MellowPine (5)

B. Steel Joist Bridging (Steel Brace)

Cross bracing or X-bracing is the most suitable method of steel joist bridging.

Floor joists are connected with diagonally oriented steel straps.

These steel straps have bendable ends that fit at the top and bottom of adjacent joists tightly.

They also have holes at both ends that allow nails to drive through these holes for easy fastening and tightly securing them in place.

Nailless straps are another type of steel joist bridging. These straps have a nailing plate on each end for simple installation.

Both ends of these straps are easily bendable to provide a tight and secure fit. The ends are then hammered into the joists to secure a connection between the joist and the strap.

These nailing plates are not strong enough to properly hold the shear forces.

Nailing plates will come out when joists will dry out or twist.

Floor Joist Blocking and Bridging: Compared - MellowPine (6)

C. Wood Composite

Wood composite bridging strips perform the same function as solid wood joist bridgings.

Wooden composites do not come in standard strip sizes. You have cut them by yourself in the required dimensions.

Wooden composites provide a strong connection to the joists.

You can use a single wood composite strip or go for cross bracing.

Again you have to cut them at an angle similar to the solid wood bridging of joists.

There is no specific condition in which you have to opt for any specific method out of those methods mentioned above. It is totally on you which method you are going to opt for.

Is cross-bracing the same as joist bridging?

The term ‘joist bridging’ is often confused with ‘cross bracing’ and is frequently used by the general audience interchangeably. However, they are not the same.

Bridging can be termed as an act of fastening strips between two adjacent joists to avoid the bouncing of floors and distributing deflection loads among the joists.

However, joist cross-bracing is a method of joist bridging in which bridging strips form a shape of ‘X’ between two adjacent joists.

Is Blocking (or Bridging) Required for Floor Joists?

According to clause R502.7.1 of the International Residential Code (IRC), blocking is essential for floor joists having a thickness of more than 2 inches and a width of 12 inches.

Blocking is also required at the supporting end of joists.

If both the ends of a joist system are blocked to rim joists or band joists and the width/thickness ratio of the joist is less than 6:1 then blocking is not necessary.

If joists are fastened properly at both ends then there is no compulsion of proving blocking or bridging systems until it seems required.

How to Install Blocking Between Joists

Installation of blocking between joists is a labor-intensive process and requires the use of various types of equipment.

A wrong measurement can waste your entire effort.

If you are great at measurements then you can pull it off. Otherwise, hiring an expert is highly recommended.

To install blocking you need some equipment such as a ladder, a saw a measuring tape, solid wood, a pencil, a hammer, and of course some nails or screws.

After assembling all the listed equipment you are good to start blocking.

Here is a step by step process for installing blocking between joists:

1. Identify the location where your floor is experiencing bounce or wobble. If your joists are wider than 12 inches and span more than 16 feet then you can go for blocking.

As per the joist blocking code of IRC, blocks should not be placed more than 8 feet apart.

2. Measure the distance between two adjacent joists. The easiest way to measure the gap between joists is to put your measuring tape on the inner face of one joist and spread your tape to the inner face of the next adjacent joist.

This will tell you which type of lumber or wood you will require for blocking.

Measure the length of your joists also. Mark two points at 8 feet apart. Suppose you have a joist of 20 feet in length. You can mark one point at 6 feet and another at 14 feet.

Now both these points are equally spaced from the wall i.e. 6 feet and the distance between these two points is 8 feet, which satisfies the provisions of the building code.

3. Now cut the pieces of wood having a length equal to the spacing between two consecutive joists and their width should be equal to the width of the joists.

Keep these blocks in marked locations and fasten them with at least two nails from one end. For other ends, you will require toe-nailing because you don’t have space for swinging your hammer.

5. Cut another piece and insert it between another pair of joists same as you have done in step 4.

Another row of blocking can be installed by following the above steps in the same manner.

How to Install Bridging Between Joists

You don't have to spend a lot to install a joist bridging system for your structures.

The key requirement is that you have to cut all the pieces at the same angle.

If you already have a subfloor above the joists, then nailing will be difficult on the top side. You have to take thicker wooden strips because thinner wooden strips are not suitable for toenailing.

Here is a quick guide on how to install bridging between joists.

1. Determine the location where you want to install your bridging. If your joists are wider than 12 inches and span more than 16 feet, you can install your bridging.

You have to keep a maximum of 8 feet distance between two rows of bridging as per the code requirements.

2. The next step is to choose your type of bridging. If you have an existing floor then steel strips can be a good option. For old houses, you can install nail-less bridging steel strips.

If you are installing a new one, then wood or engineered wood can be a good choice as it is easy to install and works perfectly fine.

3. If you are going with lumber or engineered wood, then you have to cut your pieces at a proper angle.

You can use a radial arm saw to cut your pieces at an angle. If you don't have one, you can go with a normal saw also.

4. Now you have to fasten your bridging system with nails or screws. If you are using steel straps, you can simply bend them downwards to fit the gap. Palm nailers are a good choice for nailing.

Always prefer 6d or 8d nails for nailing. If you are working on a new floor then only nail the top side of the joist. After installing the floor you can nail the straps from the bottom.

Nailing top and bottom before installation of the floor can move joists out of line.

Joist Blocking vs Joist Bridging – Which is Better?

Due to the solidity of blocks, blocking is a slightly better option as it provides additional strength to the joists.

Especially when you are installing a new floor, blocking could be a better choice because you will have a lot of scrap lumber leftover that you can use as blocking.

For older homes or wooden structures, bridging can be a better option. The use of solid lumber or metal strips for bridging are the best choice here.

The advantage of bridging is that you can reduce the risk of a ‘hump’ forming if blocks and joists dry out at a different rate.

Floor Joist BlockingFloor Joist Bridging
A single piece of wood with equal width of the joist is installed perpendicularly to two adjacent joists.Normally two thin strips are installed diagonally in an ‘X’ shape between two adjacent joists.
It reduces the bounce of the floor.It also reduces the floor's bounce by leaving more space for electrical and plumbing installations.
It is less costly as it utilizes the leftovers from present construction and low-cost lumber. More costly in comparison to joist blocking as it requires a new set of wooden or metal strips.
It requires low skills.It requires a high level of skills as wooden strips need a perfect angle cut. Metal strips are very easy to install.
Joist blocking is normally used in new constructions.Bridging can be effective for older structures.
Blocking hinders the path of electrical and plumbing runs.Open space in the bridging system allows smooth installation of electrical and plumbing runs.

Frequently Asked Questions (FAQ)

Do floor joists need cross bracing?

If you notice a bounce or sag on your floor while walking on it, you should think about installing cross bracing floor joists. Cross bracing is typically required in older homes where the strength of the joists has deteriorated over time.

According to building codes, if your joist is wider than 12 inches, you will definitely need cross-bracing in a new home.

What is cross bridging?

Cross bridging refers to the installation of a pair of diagonal bracings in an ‘X’ shape between two adjacent joists to avoid twisting of joists.

Because of the X shape of floor joist cross bridging, one strip will be in tension and another strip will be in compression which will increase the sturdiness and stability of floors.

Cross-bridging is always necessary when your joists are wider than 12 inches and thicker than 2 inches in new construction.

If you have an old wooden structure and you are willing to correct the movement of the floor, then you can go with floor joist cross bridging.

When should you block deck joists?

According to the building code, blocking is required to avoid twisting or rotation of joists. Twisting/rotation of the joist may lead to a bouncy or wobbly floor.

To avoid this problem you will need to block deck joists at a maximum of 8 feet apart. Many builders find that blocking at 4-6 feet apart is more efficient and improves structural health and strength.

FAQs

Is blocking the same as bridging? ›

Blocking midway between support beams strengthens the structure and decreases deflection and bounce by distributing the forces between connected joists. Bridging between joists reduces lateral movement caused by walking or running across the parallel joists.

Does blocking add strengthen floor joists? ›

As incremental parts of a building's structure, joists are not easily replaced. You can, however, strengthen the joists by securing another length of wood to the existing joist, called "sistering," or reduce wobbly floors with block inserts between the joists, called "blocking."

How far apart should joist bridging be? ›

Proper joist spacing is required for proper installation. Joist spacing should never exceed 16” on center unless using TT/AZEK Max board= 24" max. For a more rigid feel, 12” or less, may be preferred. If adding additional framing be sure to keep all boards even and in plane across tops.

Do I need blocking between joists? ›

Blocking panels are required at each end of floor joists not otherwise restrained from overturning by a band joist or rim board. Blocking panels are required between floor joists supporting load-bearing walls running perpendicular to the joists.

What are the 3 various types of blocking? ›

There are 3 types of volleyball blocks when you're referring to the number of people: a single block, a double block, and a triple block. Then there are different types based on technique: blocking line, blocking cross-court, soft blocking and swing blocking.

What is an advantage of blocking? ›

Blocking is used to remove the effects of a few of the most important nuisance variables. Randomization is then used to reduce the contaminating effects of the remaining nuisance variables. For important nuisance variables, blocking will yield higher significance in the variables of interest than randomizing.

Does bridging strengthen floor joists? ›

During construction, the bridging keeps joists vertical so they can't twist out of place. After construction, for the life of the house, the bridging helps stiffen and strengthen the joists by tying them together so that some of the load on one transfers to neighboring joists.

Does blocking increase joist span? ›

Some deck builders install blocking throughout the frame to increase the strength of long joist spans and promote a more solid structure. Often times, scrap materials from your framing lumber may be used for blocking.

How can I make my floor joists firmer? ›

Doubling the thickness of joists by adding material to their sides increases strength and stiffness. For joists made of sawn lumber, shown here, Tom attaches a 2x of the same length and width; if the bounce is severe enough, he may use an engineered or laminated veneer lumber (LVL) beam.

Can you use screws for joist blocking? ›

Square down from the chalkline on one side of every joist to provide a reference line for installing the blocking. 10. Through-screw the blocking where possible. Use at least two screws per end to secure the blocking.

Is joist bridging necessary? ›

Bridging is sometimes required in floors or roofs when solid-sawn lumber joists are used. This addition provides lateral support to twisted joists to help maintain a vertical orientation. It also facilitates load sharing.

What is the most common spacing for floor joists? ›

Most often, floor joist spacing is 16 inches apart on center, but this can vary depending on building codes and the requirements of the structure in the blueprint. Floor joists help distribute the load of a structure.

What are the minimum dimensions of blocking for a deep joist? ›

Full depth hyJOIST® blocking is required above every support. Use minimum single blocks at maximum 1800mm spacing or a pair of blocks at maximum 3600mm spacing. Blocks required at start and end of joist run. Alternatively, rimboard or boundary joists can be utilised for lateral restraint.

What do you put between floor joists? ›

Floor & Wall Joist Insulation

EcoFoil Between Joist Insulation is the recommended product for use in between joists in your home or structure. It's designed to be installed in the walls and floors to help keep your building cooler in the summer and warmer in the winter.

What blocking or strutting is required to strengthen deep joists? ›

solid blocking between the outer pairs of joists and between intermediate pairs at not more than 1.8 metre centres. Where span exceeds 3 metres additional mid-span blocking at 1.8 metre spacings may also be required.

What are the rules of blocking? ›

Essentially, blocking is pushing, with certain restrictions; in blocking one may not grasp another player or do any sort of pulling, and the hands must not extend beyond the line of each armpit; otherwise a holding penalty will be assessed.

When should you use a blocking technique? ›

Using blocking techniques when sparring allows us to move the attacking limb before the attack is completed so get closer to counter, it can stop the attacker's follow-up technique and upset his balance, you can use a blocking technique to move yourself to a safer position.

What are two types of blocking that occur? ›

1 | Swing blocking: Used to cover more ground and requires swinging the arms to gain momentum, distance and height. 2 | Static blocking: More controlled and simpler footwork, normally the first type of blocking athletes are taught.

What are the disadvantages of block? ›

Disadvantages of Concrete Blocks:

Some of the blocks may need to be cut to reach critical systems. Concrete block homes aren't usually attractive from the outside. Over time, concrete blocks may be subject to water seepage. Some regional preferences may not be compatible with this material.

Is blocking a good idea? ›

Blocking people who you know who have negatively impacted you, like through bullying, toxic friendships, and constant harassment and contact, can also help improve your well-being. Blocking can be tricky though, especially when it comes to people you know.

Is blocking always necessary? ›

It really depends on what it is and what it's going to be used for. Items like amigurumi rarely need blocking, where as accessories and homewaers are more of a grey area. I usually block all my garments but to some extend it depends on the fibre and stitch pattern I've used.

What are 3 types of bridging in construction? ›

Bridging solves problems that Owners often encounter with other project delivery methods, including the three most commonly used project delivery methods (“Design-Bid-Build”, “Design-Build” and “CM-at-Risk”) illustrated below.

How do you strengthen weak floor joists? ›

To strengthen floor joists, block the joists by nailing a piece of lumber between them. Another method is to sister the joists with a piece of lumber. Plywood and steel plates are also effective in increasing the strength of run-out joists.

Is it better to nail or screw floor joists? ›

Nails are better in nearly all cases, particularly when installing joists. A regular 3 ½” deck screw has very little sheer strength. “Shear” strength refers to a screw's ability to hold lumber, or other material, together against the force of gravity.

What does blocking do between joists? ›

Back-blocking is a reinforcing technique that works to minimize ridges between butted joints. It provides panel edge support, which results in a smoother surface by preventing movement that can cause deformation and cracking.

Should blocking be staggered? ›

There are two good reasons to stagger the blocks like this: It makes it easier to nail them, and a plaster wall won't crack when applied over them. Cracks can develop in plaster if the blocks are nailed in a straight line. Fire blocks are also used to close off one framed area from another.

Does blocking reduce deflection? ›

Blocking, short pieces of 2x stock the same depth as the joists, stops sideways deflection and ties the joists together so they can effectively share floor loads.

How much floor sag is too much? ›

The degree to which your floor slopes or sags indicates whether or not you have reason for concern. Typically, floors that slope 1-1/2 inches or less in 20 feet is not a problem. Floors that sag 2 inches or more in 20 feet, though, are a cause for concern.

Why does my whole house shake when I walk? ›

Wood-framed floors are the most typical culprit of floor vibrations due to small deflections up and down as the joists are loaded and unloaded. While this type of floor is designed to support people, furniture, and large appliances, certain movements can cause a floor to vibrate over time.

Why are my floors so bouncy? ›

If the joists or columns are spaced too far apart, the joists will sag and bounce. Home remodeling projects, such as adding an addition, installing new appliances, granite countertops or large furniture pieces can add extra weight and stress to the floor joists– leading to bouncy floors.

Why don't you use screws when framing? ›

Nails are often preferred for structural joining, including framing walls, because they are more flexible under pressure, whereas screws can snap.

Where should you not drill holes in joists? ›

You can put holes in floor joists anywhere along the length of the joist, but you can't put them any closer than 2″ from the top or bottom edge of a joist. The maximum size of a hole is 1/3 the depth of the floor joist.

How do you install bridging between joists? ›

Nail bridging on all joists

Start by making sure the original bridging is tightly fastened; add nails or screws if necessary. Then measure the span of the joists (the distance between walls or beams that support the joists). Divide the span by three and add rows of bridging at both of the one-third points.

How long can floor joists be without support? ›

With 16” spacing, a floor joist can span up to 14' as long as it is not cantilevered and terminates with support on either end. If the joists are 24” apart, then one 2×10 joist can span up to 11' 5”.

How much do floor joists need to overlap? ›

This meets the 3-inch overlap requirement. This is something you do not have to worry about with a manufactured wood I-joist. I-joists can be ordered and designed for each application, or a stock size, usually 16 to 18 feet long, can be cut on-site to fit different applications.

Do floor joists need cross bracing? ›

If your floor seems bouncy or saggy, you may need to consider cross bracing your floor joists. Floor joist bracing is often necessary in older homes where the existing joists may have worn out over time.

Do floor joists run the same way on all floors? ›

An important thing to know about joists is that they usually run in the same direction throughout a house. If the visible joists in a basement or attic run east to west, for example, you can be fairly certain the invisible joists under the bedroom floor also run east to west.

Can floor joists be 24 inches apart? ›

23/32" OSB is recommended for joist spacing up to 19.2" on-center. 7/8" OSB is recommended for spacing up to a maximum of 24" on-center while 1 1/8" OSB is recommended for spacing up to 32" on-center.

How far can a 2x8 joist span without support? ›

A rule of thumb is 1.5 times a joist's depth but in feet when spaced at 16” centers. In general, a 2×8 will span 1.5 x 8, so 12-feet. Based on all factors though, a 2×8 joist span is 7'-1” to 16'-6”, and a rafter 6'-7” and 23'-9”. What is this?

Is bridging or blocking better? ›

Especially when you are installing a new floor, blocking could be a better choice because you will have a lot of scrap lumber leftover that you can use as blocking. For older homes or wooden structures, bridging can be a better option. The use of solid lumber or metal strips for bridging are the best choice here.

What is code for blocking on floor joists? ›

Building code requires the use of blocking for floor joists that exceed 2 inches in width by 12 inches in depth. Blocking also needs to be provided at the supporting end of a joist. In addition to providing lateral support, blocking helps transfer weight to adjacent joists, so that the floor acts as a unified system.

What is the minimum depth that any solid blocking can be? ›

full-depth solid blocking not less than 35 mm thick that fits tightly between joists. herringbone strutting consisting of two pieces of 35 x 35 mm timber set diagonally in opposite directions between the top and bottom edges of the joists.

Do you need blocking between floor joists? ›

Blocking panels are required at each end of floor joists not otherwise restrained from overturning by a band joist or rim board. Blocking panels are required between floor joists supporting load-bearing walls running perpendicular to the joists.

Do I need to put blocking in between joists? ›

Blocking, according to the building code, is required at the open end between joists to prevent rotation or at 8-foot maximums if the joists are greater than 2×12 in dimensions. Most builders, though, recognize that blocking every 4 to 6 feet unifies the frame and improves structural strength.

Does blocking make floor stronger? ›

You can, however, strengthen the joists by securing another length of wood to the existing joist, called "sistering," or reduce wobbly floors with block inserts between the joists, called "blocking."

What are the strongest joists? ›

Easi-joist® engineered joists – parallel chord trusses using stress-graded timber chords, plated together with Wolf Systems' patented, precision engineered metal webs, EP 1 985 774 B1- provide the strongest system available on the market.

What are the 2 main types of timber floor strutting? ›

There are three main options available when considering strutting for timber floors: solid timber blocking; timber herringbone strutting; proprietary strutting devices.

What is block and bridge? ›

The classic block-and-bridge technique can steer the conversation toward more favorable, and often mutually beneficial, topics. Spokespeople regularly use this technique to regain control over the direction of the interview and to ensure their message gets across as intended.

What does blocking mean in construction? ›

Blocking (dwang, nog, noggin, and nogging) is the use of short pieces of dimensional lumber in wood framed construction to brace longer members or to provide grounds for fixings.

What does blocking in mean in drawing? ›

A block-in is a light sketch of your whole composition before any details or shading are done to make sure it's placed correctly on the page and that the proportions and distances are accurate. If you rush into heavy shading and detail before you've done a proper block-in, erasures will leave a ghost image.

What are the two types of blocking? ›

1 | Swing blocking: Used to cover more ground and requires swinging the arms to gain momentum, distance and height. 2 | Static blocking: More controlled and simpler footwork, normally the first type of blocking athletes are taught.

What are the 4 steps of the bridging technique? ›

4 steps to bridging workplace differences
  1. Understand the other person. When there is a disagreement between you and other co-workers, step back and try to understand their intent. ...
  2. Discover common ground. People like – and work better with – people who are like themselves. ...
  3. Make a connection. ...
  4. Adapt your style.

Who uses bridge blocking technique? ›

The Bridge is used by offensive linemen and tight ends on the line of scrimmage vs. base blocks where movement by the line is common, especially in modern zone schemes. Wide receivers, tight ends and offensive linemen will execute the Bridge when blocking in space as well as running backs in pass protection.

What is the bridging technique? ›

The bridging technique is one of the cornerstones of media training and an essential tool with which to control a media interview. Put simply, it allows the interviewee to move the conversation on from a negative or unhelpful question posed by the interviewer.

What is the difference between blocking and bracing? ›

Intro to Blocking & Bracing

Blocking means preventing the load from moving laterally (side-to-side, front-and-back) and bracing means preventing the load from moving vertically (up-and-down). Without proper bracing, a load can jump over its blocks.

What is the difference between blocking and framing? ›

Blocking is lumber installed within framing meant to be a nailer for something else later in the build. Permanent Bracing is lumber installed within framing specifically to stabilize or strengthen that framing.

When to use blocking in framing? ›

Blocking provides a solid spot in the wall for attaching things such as cabinets or handrails. In some situations, blocking is required as a fire-stop where a stud bay extends between floors. This keeps the bay from acting as a chimney for a fire. Without fire-stops, a fire could quickly spread from floor to floor.

What's the difference between blocking and removing? ›

What About Existing Chats. When you block someone, their chat disappears from your account. The chat is still available on the blocked person's account there. Removing a friend from Snapchat won't bother with existing chats here.

What is blocking and why is it important? ›

Blocking in filmmaking refers to where actors stand on a set and how they move around over the course of filming, or as some would say choreography. The position of an actor on a set can greatly affect how their performance turns out so getting this right is crucial for film directors.

Why is it called two blocking? ›

Etymology. From nautical terminology for a ship's rigging or crane rigging in which two blocks are locked together, stopping the line.

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