How to Determine the Right Strapping Strength for Your Load

Strapping is one of the simplest and most overlooked load-securement components in the warehouse. When it’s undersized, loads shift, lean, or fail in transit. When it’s oversized, you spend more than necessary and may introduce handling inefficiencies.

Choosing the right strapping strength isn’t complicated—but it does require understanding how your load behaves in storage and in transit.

This guide walks through how to determine the appropriate strap type, width, and break strength for your application.

Step 1: Understand What Strapping Is Actually Doing

Strapping does not carry the full weight of your load. Its primary job is to:

  • Stabilize cartons or products on a pallet

  • Maintain compression

  • Prevent shifting during handling and transport

  • Reinforce corrugated packaging

If your load requires structural containment (heavy machinery, crated exports, oversized equipment), you may need a custom pallet or crate design in addition to strapping:

→ Shipping Oversized or Heavy Loads? When You Need a Custom Pallet or Crate

→ Custom Pallets & Crates for Machinery and Industrial Equipment

Strapping is a stabilizer—not a substitute for structural support.

Step 2: Identify Your Load Weight and Stability

Start with three variables:

  1. Total load weight

  2. Load height

  3. Product rigidity (stable cartons vs. shifting bags, irregular items, etc.)

A 1,500 lb pallet of uniformly stacked corrugated boxes behaves very differently than a 1,500 lb pallet of bagged material or loose components.

As a general rule:

  • Stable, uniform loads require less strap strength

  • Tall or flexible loads require more tension and stronger strapping

  • Heavier loads need wider strap or stronger material

If you’re unsure whether your pallet itself is appropriate for the load, review:

→ How Much Weight Can a Pallet Really Handle?

→ When a Standard Pallet Isn’t Enough — Signs You Should Consider Custom

Step 3: Choose the Right Strap Material

There are three primary strapping materials used in warehouse environments.

Polypropylene (PP) Strapping

Best for: Light to medium loads

Common uses: Cartons, light pallet loads, bundling

  • Lower break strength

  • More stretch

  • Cost-effective

  • Ideal for hand applications

Polypropylene is typically sufficient for lighter palletized shipments secured with stretch film.


Polyester (PET) Strapping

Best for: Medium to heavy pallet loads

Common uses: Heavier cartons, building materials, appliances

  • Higher tensile strength

  • Better retained tension over time

  • Less stretch than polypropylene

  • Often used in machine applications

PET strapping is a common replacement for light-gauge steel in many warehouse environments.


Steel Strapping

Best for: Very heavy, rigid loads

Common uses: Machinery, metal products, lumber, export crates

  • Highest break strength

  • Minimal stretch

  • Best for rigid loads with sharp edges

  • Requires proper edge protection

Steel is typically reserved for industrial applications where load shift would create serious risk.


Step 4: Understand Break Strength vs. Working Strength

Every strap has a break strength (maximum load before failure).

However, you should never design around break strength alone.

A common rule of thumb is:

Working load = 50% or less of rated break strength

This accounts for shock loads, transport vibration, and imperfect tensioning.

If your pallet weighs 2,000 lbs, you don’t need 2,000 lbs of break strength in a single strap—but you do need sufficient combined working strength across multiple straps to resist shift.

Step 5: Consider Transportation Conditions

Ask:

  • Is the load staying local or shipping long distance?

  • Will it go LTL (more handling) or full truckload?

  • Is it going overseas?

  • Will it sit in storage for months?

Export shipments often require stronger containment, particularly when paired with heat-treated pallets or crates:

→ Export Pallets & Crates: ISPM-15, Heat Treatment, & Shipping Requirements

Long transit times and humidity changes can reduce strap tension, especially with polypropylene.

Step 6: Don’t Overlook Edge Protection and Strap Count

Strap strength is only part of the equation.

You should also consider:

  • Corner protectors

  • Edge boards

  • Number of straps used

  • Strap placement pattern

Sometimes increasing strap count is more effective (and economical) than upgrading material strength.

Step 7: Match Strap Type to Application Method

Are you hand-strapping or using a machine?

  • Hand strapping often favors polypropylene or lighter PET

  • Machine strapping typically uses PET

  • Steel requires specialized tools

If you’re evaluating application method, review:

→ Hand Stretch Film vs. Machine Film: Which Should You Use?

→ How Much Does Stretch Film Cost

Strapping and stretch film work together. One stabilizes through compression, the other reinforces through tension.

A Practical Starting Point

While every application varies, these general guidelines often apply:

  • Under 1,000 lbs → Polypropylene may be sufficient

  • 1,000–3,000 lbs → PET is often appropriate

  • Over 3,000 lbs or rigid industrial loads → Consider heavy PET or steel

Final selection should account for load stability—not weight alone.

When You Need Guidance

Choosing the right strapping strength isn’t about buying the strongest option available. It’s about aligning material, width, tension, and strap count with how your load actually behaves.

At Atlas Pallets, we help customers think through load configuration, pallet design, containment strategy, and shipping method as a complete system — not isolated components.

If you’re unsure what strength makes sense for your application, request a quote and include:

  • Load weight

  • Dimensions

  • Product type

  • Shipping method

We’ll recommend a practical, cost-effective solution.

Request a Quote

Or give us a call at (630) 765-5476.