Horizontal lifting clamps and vertical lifting clamps are designed for completely different lifting applications.

Horizontal lifting clamps are used to lift steel plates in a horizontal position.
Vertical lifting clamps are used to lift steel plates in a vertical position.
Horizontal clamps must always be used in pairs (2 clamps) or sets of four (4 clamps) together with a spreader beam.
Vertical lifting clamps such as CD and CDH models are specifically designed for thick steel plates and single-point lifting operations.

Using the wrong clamp type may result in load instability, plate deformation, or lifting failure.

What Is the Difference Between Horizontal and Vertical Lifting Clamps?

The main difference is the direction in which the steel plate is lifted.

Feature	Horizontal Lifting Clamp	Vertical Lifting Clamp
Lifting Direction	Horizontal	Vertical
Typical Models	PDB, AMS, LC	CD, CDH, YDG
Number Required	2 or 4	Usually 1
Single Clamp Use	Not Allowed	Allowed
Spreader Beam Required	Yes	No
Best For	Thin and large plates	Thick steel plates
Plate Turning	No	Yes
Single Point Lift	No	Yes

Expert Rule

A horizontal lifting clamp should never be used as a single lifting point.

This is one of the most important safety principles in steel plate lifting.

When Should You Use a Horizontal Lifting Clamp?

Horizontal lifting clamps are designed for moving steel plates while maintaining the plate in a flat, horizontal orientation.

Typical industries include:

Steel service centers
Shipbuilding yards
Steel warehouses
Fabrication workshops
Construction material handling

Typical applications include:

Loading steel plates onto trucks
Moving plates between workstations
Warehouse storage operations
Handling thin steel sheets

Why Must Horizontal Lifting Clamps Be Used in Pairs?

This is a question frequently asked by engineers and purchasing managers.

Short Answer

Because a steel plate cannot remain balanced when suspended from a single horizontal clamp.

Correct Configuration

Horizontal lifting clamps must be used:

Two clamps + spreader beam
Four clamps + spreader beam

Example:

Crane
   │
Spreader Beam
  /      \
Clp   Clamp
   │      │
Steel Plate

Why Is a Spreader Beam Necessary?

A spreader beam distributes the load evenly between lifting points.

Without a spreader beam:

The plate may bend
Load distribution becomes uneven
Clamps may become overloaded
The risk of slippage increases

This is especially important when lifting:

Thin steel plates
Long steel plates
Wide steel plates

Industry Best Practice

Thin plates that are prone to sagging should always be lifted using paired horizontal lifting clamps and a properly rated spreader beam.

This recommendation is widely followed throughout steel fabrication and material handling industries.

When Should You Use a Vertical Lifting Clamp?

Vertical lifting clamps are designed for lifting steel plates upright.

Common models include:

They use a cam-lock gripping mechanism that increases holding force under load.

Why Are CD and CDH Clamps Used for Thick Steel Plates?

CD and CDH lifting clamps are optimized for:

Thick plate lifting
Heavy plate transfer
Single plate handling
Vertical storage operations
Welding and fabrication preparation

Typical Setup

Crane Hook
     │
CDH Clamp
     │
Steel Plate

Because the plate remains vertical, the load acts directly through the clamp body, making single-point lifting possible.

Can a Vertical Lifting Clamp Lift Thin Steel Plates?

Technically yes.

However, it is usually not the preferred solution.

Thin plates may:

Flex during lifting
Twist under load
Create unstable lifting conditions

For thin and wide plates, horizontal lifting systems generally provide better stability.

Which Clamp Is Safer for Steel Plate Handling?

The answer depends on the application.

Horizontal Clamp Is Safer When:

Handling thin plates
Lifting long plates
Moving large sheets
Preventing plate deformation

Vertical Clamp Is Safer When:

Handling thick plates
Turning plates upright
Using a single lifting point
Working in limited space

The safest clamp is always the one designed for the specific lifting configuration.

Most Common Mistakes in Steel Plate Lifting

Mistake #1: Using One Horizontal Clamp

This is unsafe and should never be done.

Potential consequences include:

Plate slipping
Load imbalance
Clamp overload
Serious workplace accidents

Mistake #2: Ignoring Plate Thickness

Every lifting clamp has a specified:

Jaw opening range
Working Load Limit (WLL)
Material thickness range

Always verify these parameters before lifting.

Mistake #3: Not Using a Spreader Beam

For horizontal lifting operations, a spreader beam is not optional.

It is an essential component of a safe lifting system.

Frequently Asked Questions (FAQ):

Can I lift a steel plate with one horizontal lifting clamp?

No. Horizontal lifting clamps must always be used in pairs or sets of four together with a spreader beam.

Can a CDH vertical lifting clamp be used for single-point lifting?

Yes. CDH clamps are specifically designed for vertical lifting and single-point lifting applications.

Which lifting clamp is best for thin steel plates?

Horizontal lifting clamps used in pairs with a spreader beam are generally the preferred solution.

Which lifting clamp is best for thick steel plates?

Vertical lifting clamps such as CD and CDH models are typically the preferred choice.

Expert Recommendation

For maximum safety and operational flexibility, most steel fabrication facilities maintain both lifting systems:

Horizontal System

PDB Horizontal Clamp
AMS Horizontal Clamp
Spreader Beam

Used for thin, long, and large steel plates.

Vertical System

CD Vertical Clamp
CDH Vertical Clamp

Used for thick plates, vertical transportation, and single-point lifting.

Final Takeaway

If there is only one rule to remember, it is this:

Horizontal lifting clamps must never be used individually. They must always be used in pairs or sets of four together with a spreader beam.

And:

Vertical lifting clamps such as CD and CDH models are specifically designed for thick steel plates, vertical lifting, and single-point lifting operations.

Choosing the correct clamp configuration improves safety, protects materials, and ensures compliance with industry lifting practices.

Horizontal vs Vertical Lifting Clamps: Key Differences, Applications, and Safety Rules for Steel Plate Handling