Hello everyone, this is DIY Renova.

Essential for correcting the tilt of the house!?The jack has a big presence!

However, there are many different types, so do you ever have trouble choosing a jack for your pillar?

So this time, we've put together a list of how to choose when purchasing and where you can buy it.

So, here you go.

1. Introduction: Why do jacks need to be used to repair pillars?

When considering renovating a wooden house, pillar replacement and reinforcement work may be necessary.for example,The pillars have been damaged by termites or corroded by moisture from the water area.Cases that do, orDamage caused by earthquakes etc.This is the case when you have done it.Pillars play a very important role in supporting homes, so if overlooked it will affect the overall durability of the building.

However, to repair or replace the pillarsTemporarily lift the pillar to dodge the loadIt must be.Here, tools to apply great force are needed, and this is what makes it possibleJacking machineis.Use an appropriate jack to accept the load on the pole,Safely lifting and securingThis will allow you to proceed smoothly with repair work.

However, even if you call it a jack, there are various types, including shape, power (hydraulic/screw type), and load capacity.To make your home last longer,Choose the right jack and use it safelyIt is essential.In this article, we will explore in-depth the key points to consider when selecting a jack for renovations and tips on how to buy it, combining an engineering perspective and practical know-how.

2. Supporting pillars: The relationship between the structure and load of wooden houses

Wooden houses are made up of multiple elements, such as columns, beams, foundations, and roof frames.The pillars are constantly subjected to weight from the top (the loads of roofs, second floors, and even furniture, people, etc.).The load that a pillar receives can range from hundreds of kilos to several tons.Sometimes, even greater forces work in a complex way throughout the building.

Repairing the pillar means thisLoad flow throughout the buildingIt can also be said to be an act of temporarily dispersing or detouring theIf a pillar fails, it cannot be ruled out that excessive force will be applied to other structural components, leading to distortion, cracks, or, in the worst case, collapse.

When choosing a jack,How much load is the target pillar?First, understand and thenThose with the ability to support them wellYou need to prepare.If you think about this easily, the jack may break or cause misalignment during installation, which could lead to serious accidents.Engineering,How much safety factor should be ensured?becomes important.Generally, construction sites often ensure a safety factor of more than twice as high, but DIY and renovations can also provide more room for you.

3. Basic conditions for choosing a jack

3.1. Understanding the required load capacity

The first thing to consider is the load capacity (load capacity) required for the jack.For example, if you want to lift a pillar that is assumed to be under a load of 2 tons,3-5 ton class or moreIt is common to choose a jack with the ability to do so.Considering the safety factor, it is safer to have as much room as possible.However, as the jack itself grows larger, the price and handling become more difficult.Find the necessary and sufficient sizeThat's important.

3.2. The importance of stroke (lifting height)

Depending on the jack,The height (stroke) that can be lifted at once is different.When replacing or reinforcing a pillar in a wooden house, it is often enough to lift it up a few centimeters to tens of centimeters.For older homes or for major improvements to the floor levelIn some cases, larger strokes may be required.

If you only have a jack with a small stroke,Jack up gradually while frequently placing the platformThere are ways to do this, but this increases the hassle and safety risk.Depending on the scale of the workHow high is it necessary?Make sure to assume this in advance.

3.3. Safety and stability

To support and lift loadsStabilityIt's also important.Depending on the bottom area and shape of the jack,The installation surface is unstableThere are also types that are more likely to be.Especially when used under wooden floors or around foundations, it is possible that the ground is soil.In that case, alwaysLay the bottom plate or receiver plate to prevent the force from being concentrated on one pointYou need to.

Additionally, the jack itselfIs the structure sturdy?This is also a point to check the manufacturer's reliability and track record.Bad productIf you choose this option, there is a risk of oil leaking or the screw part being damaged during use.These problems can become serious issues that threaten the safety of not only the building but also the workers.

3.4. Operating (hydraulic or screw type)

The operability of jacks differs mainly between "hydraulic (bottle jacks, etc.)" and "screw jacks (such as screw jacks)."The hydraulic type isPumping action and lever operationWhile it lifts up relatively smoothly,Oil leaks and maintenance of cylinder partsmay be necessary.The screw type isIt requires strength, but simple and hard to breakIt has the characteristic of this.

At the renovation site,Easy to adjust the height in detailIf screw type is preferred for this reason,I want to apply great force quicklyThis is why hydraulic types are sometimes used.Choose according to your work scale and preferencesThat would be good.

3.5. Price range and cost performance

The price of a jack varies greatly depending on the load capacity and brand.A small jack of about 1 tonYou can get it for a few thousand yen,Large jacks that support over 10 tonsThis can lead to a total of tens of thousands to tens of thousands of yen.With an eye on the overall budget and work content for the renovation,A good value jackIt is important to choose.

however,Cheap or badYou need to be careful not to do so.Safety firstIf you think about it, choosing a product that is somewhat robust will ultimately avoid any problems.

4. Types and characteristics of jacks

4.1. Bottle jack (hydraulic type)

The bottle jack is a type with a vertically extending cylindrical body and a built-in hydraulic cylinder.Automobile maintenance and construction sitesHowever, it is widely used and has high load capacity despite its compact size.

• merit: Compact, easy to apply vertical force, can support large loads
• Disadvantages: If the cylinder part is dirty, it may cause malfunction, making it difficult to use horizontally

4.2. Floor jack (garage jack)

Used for car tire changeHydraulic jack with wheelsis.It is easy to move on the floor and can be lifted smoothly by operating the lever.however,It's difficult to get the heightTherefore, it may be necessary to place large blocks or other objects on low floor levels or under wooden posts.

• merit: Easy to move and relatively easy to operate
• Disadvantages: If oblique force is applied other than vertical direction, pay attention to stability.

4.3. Screw jack (screw jack)

Turning the spiral (screw) opens and closes the top and bottom plates,Slowly and surely liftThis is a feature of screw-type jacks.It is also popular in old house renovation sites.Because the mechanical structure is simple,It is not easily broken and easy to fine-tuneThat's what makes it attractive.

• merit: Simple structure, hard to break, easy to fine-tune
• Disadvantages: It takes a lot of effort to apply a lot of force (heavy hand-cranking)

4.4. Wedge Jacks and Special Jacks

The wedge jack isInsert two or more slope boards and drive themThis is a type of jack that gradually widens the gaps.It is useful for creating subtle gaps,Repairing large pillars of wooden housesThere may be some lack of ability.

Others includeElectric hydraulic jackThere are special jacks such as these, but there are many overspecs for DIY and small-scale renovations.This will be an option for large-scale repairs and professional sites.

5. Things to note when using jacks when renovating wooden buildings

Why is jacks dangerous?

If you jack it up and suddenly slide it down and fall, the house may collapse.

In fact, such incidents have happened in Japan as well.

Nikkei XTECH"The cause of the death of a home collapse was "sloppy jack-up"”

Below is a car jack-up, but the following incidents have also happened.

"The jack is missing" man in his 40s dies; upper body is under the car... is under maintenance? Higashi Ward, Sapporo City

Reference: STV News Hokkaido

5.1. Consider the overall balance of the building

In wooden houses, not only one pillar but multiple components, such as beams and foundations, work together to support the building.Rapidly lift only certain pillarsThis can cause the entire building to become unbalanced, causing cracks and distortions to occur in other parts.

Therefore,The condition of adjacent columns and walls, and the impact on beams and bracesIt is important to take this into consideration while jacking up in stages.

5.2. Effects on vibration and deformation

When jacking upSlight vibrations and shocksbut,Wall cracks and window sash distortionIt may lead to.Especially in long-established wooden houses,Earthen wallorPlasterThis is often weak to impact, such as those that have deteriorated over time.

Before working,Reinforcement to check the surroundings and disperse stress if possibleIt's safe to use (such as inserting support under temporary columns or beams).

5.3. Preventing secondary damage

When lifting a pillar, a large load is temporarily placed.Jack and its surrounding partsIt will take you to.The installation location isUnstableOr,The ground is too softIn that case, there is a risk that the jack may sink or slip.

Also, even after successful jacking up,Leave it unfixedThis could cause the load to move in some way, causing the jack to fall off and a steep drop.Always during constructionSpare support materialMake sure to put in (supports along the joists and beams) to prevent secondary damage.

6. Actual usage procedures (overview) and safety management

The specific steps to use jacks vary depending on the working environment, but here are typical steps and safety points.

6.1. Preparation work: Reconfirming loads and placing reinforcement materials

1. A rough calculation of the loads that the pillar receivesDo this.You can consult with an expert or estimate based on architectural drawings, so be sure to understand.
2. Jack's load capacityMake sure it is sufficient.
3. Determine where the jack is to be installed,Is the underfloor ground solid?confirmation.as neededLay thick sheets or steel sheetsPrevents sinking.

6.2. Installing the jack: How to use the receiver and attaching board

1. On the top surface of the jack, the bottom surface of the column and the beamsPut the holder onThis distributes the load.It's even more secure when you use a hard rubber plate or metal plate.
2. To allow the jack to apply vertical force,Check the angle with a level or similarThat makes it even safer.

6.3. Lift up: The importance of increasing the stage

1. Immediately lift it upIt is strictly prohibited.Little by littleAs you continue working, you slowly operate the jack while observing changes in the pillars and surroundings.
2. Always be careful of any strange noises, misalignment of pillars, or cracked beams.

6.4. Repair and reinforcement of pillars: Reinforcement and adjustment of roots and joints

1. Once the pillar is lifted up enough,Removal of corroded areas and reinforcement of termite damageDo this.as neededNew pillars and supporting pillarsmay also be installed.
2. Use hardware reinforcement and earthquake-resistant metal fittingsJoint partStrengthen theIngenuity to prevent the same problem from happening againI will apply.

6.5. Jack Down: Carefully restore load

1. Once the repairs and reinforcements are complete,Use a jack to gradually return the load to its original position..
2. Fast downThis may damage the pillars and floors, so slowly and gradually lower them down.
3. FinallyThe pillars are firmly fixedMake sure it is and remove the jack.

7. Where to buy jacks

There are broadly different ways to obtain a jackHome centers, building tools and machinery specialty stores, online shopsThe three are common.Let's take a look at each of the characteristics.

7.1. Home Center

Cainz, Komeri, Viva Home, KonanMajor home improvement stores carry everything from car jacks to bottle jacks.The load capacity is mainly 1 to 3 tons, but in stores with a wide selectionOver 5 tons of commercial jackSometimes there are

• merit: You can check the size and weight when you look at the actual product, and you can buy it and take it home immediately.
• Disadvantages: Large jacks and specialized jacks may be available for order

7.2. Construction tools and machinery specialty store

Dotted in each regionTool specialty storeorAgricultural Equipment Shop,Construction machinery rental storeAnd so,Professional JackWe deal with.Not only are there a large and durable product lined up, but the store staff often have specialized knowledge.

• merit: A wide range of high-quality products for professionals, you can choose with consultation
• Disadvantages: It may be a high threshold for general users, and the prices may be slightly higher.

7.3. Online Shop

In recent years,Direct sales sites for Amazon, Rakuten Market, Monotaro, and specialized manufacturersYou can purchase a variety of jacks.Hydraulic jackorScrew-type jackThe great advantage is that you can compare a variety of types at once.Also, by checking the reviews,The voices of people who actually used itAnother attractive feature is that you can use it as a reference.

• merit: A wide selection, easy price comparisons, and review information.
• Disadvantages: Since the product does not touch the actual product, it may be different from what you imagined after it arrives.

8. Things to keep in mind when purchasing

8.1. Manufacturer/Brand Reliability

The jack isHighly loaded toolsis.By choosing a reliable manufacturer,Risk of damage or accidentcan be minimized.Especially for DIY purposesProfessional and proven brandsIf you choose one, you can rest assured that you will need to be able to maintain and supply parts later.

8.2. Warranty and Support System

Some manufacturers offer one-year or longer warranties. If there is a problem during use, the availability of replacement or repair is a great source of reassurance. (Purchasing from a specialty store also has the advantage of making it easier to request maintenance.

8.3. Try picking it up and checking user reviews

If possible, go to the storePick it up and check the weight and working feelingI recommend this.Even if you purchase online,User ReviewRead carefully and consider products that have opinions such as "The hydraulic pressure is not good," "The screws are stiff," and "I feel unsure about the load capacity."

9. Summary: Choose the best jack to make your home last longer

When renovating or repairing a pillar in a wooden house,The existence of a jackis essential.However, if you choose the jack incorrectly,It is not possible to support the pillars sufficiently, it is difficult to fine-tune, and installation becomes unstable.This can cause a variety of problems.

As mentioned in this article, choose a jack by keeping the following points in mind.

1. Load capacity: Considering safety factors, there is a margin above the required load
2. Stroke (lifting height): Choose a type that can ensure the height required for work
3. Stability and safety: Consider also the preparation of the bottom plate and the holder plate.
4. Usability: Choose the method that suits your work environment and purpose, whether it is hydraulic or screw type.
5. Where to buy: Compare and consider at home centers, tool specialty stores, and online shops
6. Reliable manufacturer and warranty: Products that can be used safely for a long time

Renovating and repairing the homeImportant tasks to extend the life of a buildingis.Only by acquiring solid knowledge and using the best jack can you achieve?Safe and higher completionYou can revive the pillars.To protect your precious home, take your time choosing a jack and considering where to buy it.

10. Q&A: Frequently Asked Questions

Q1. What is the difference between a car jack and an architectural jack?

A. Car jacks (such as pantograph jacks) are intended to lift the weight of the vehicle,Bottom area, stability, stroke, etc. are suitable for automobile maintenanceIt is optimized for.Meanwhile, the architectural jackShape and how to hit parts to support columns, beams, etc. verticallyIt is designed with an emphasis on.There are cases where it can be used in combination,Special products depending on your work environmentIt is safer to use.

Q2. What is the recommended safety factor for a jack?

A. In professional settingsMore than twiceIt is often said that, but DIY and renovations should give you more room for more room.About 3-5 timesSome people are aware of this.The higher the safety factor, the lower the risk of accidents.Jack body size and priceIt is important to balance the work with the work content as it will also improve.

Q3. How fast is the ideal position to lift a pillar?

A. IdealSlowly raise in millimetersThat's what it is.If you slowly proceed while checking the condition every few minutes, it will be less likely to overload the entire building and will be easier to prevent deformation and cracking.

Q4. What are the signs to be careful about while jacking up?

a. Screams from pillars and beams, cracks in walls, floor sounds, etc.If you can confirm this, you will need to suspend the jack-up and determine the cause.Also, if the jack itself or the installation surface is even slightly tilted, work should be stopped immediately and reinstalled.

Q5. What are the maintenance points when using a bottle jack?

A. In the case of hydraulic jacks,Whether oil leaks, rust in the cylinder, smoothness when operatingCheck it regularly.When storingDust and moistureAvoid,Lubrication and cleaningBy doing this, you can increase the lifespan.

This is a summary of how to choose to purchase a jack for pillar repairs and where you can buy it.Choose the jack correctly and use it safelyThis will allow for more peace of mind and reliability to repair pillars of wooden houses.To ensure that your precious home is a long-lasting asset, please refer to the contents of this article and choose a jack that is satisfying.If you are unsure, one option is to consult an architectural expert or experienced craftsman.The moment your home is revived, you will surely feel the joy of renovating.