Securing a Load

Lesson 7.3.1 — The Force Rule: How Strong Is Strong Enough?

An unsecured load isn't held by its own weight — physics will move it the moment the vehicle changes speed or direction. The engineering standard (from the source) says exactly how much restraint you need, as a fraction of the load's own weight:

• Forward: restraints must hold 80% of the load's weight. Under hard braking, a load tries to keep moving forward with most of its weight's worth of force — so your forward restraint has to resist 80% of what the load weighs.
• Backward and sideways: 50% each. Acceleration and cornering are less violent than emergency braking, but still substantial.

The number that surprises people is the 80%. It means a 500 kg load needs forward restraint capable of holding 400 kg of force — because a hard stop throws nearly the whole load forward. This is why "it's heavy, it won't move" is false: weight holds a load down against gravity (1g), but a braking event applies a horizontal force the load's weight does nothing to resist. Gravity holds it to the floor; nothing holds it to the front unless you do.

Quick check: Q: You're carrying a 300 kg load. Roughly what forward restraining force must your securing arrangement resist, and why that much? A: About 240 kg (80% of 300). A hard braking event throws nearly the whole load forward with most of its weight's worth of force — and the load's weight, which only presses it downward, does nothing to resist that.

Lesson 7.3.2 — The Test Is a Hard Stop, Not a Crash

People imagine load securing is about surviving a collision. It isn't — it's about surviving the routine emergency stop, which happens far more often and is the everyday test your securing either passes or fails.

Follow the physics: an unsecured or poorly secured load in a pickup bed, under a hard stop, becomes a projectile carrying 80% of its weight forward — into the cab, through the rear window, into the driver and passengers. A load heavy enough to be worth transporting is heavy enough to kill the people in front of it during a stop that the vehicle itself easily survives. And a load that shifts sideways mid-corner (the 50% case) changes the vehicle's balance exactly as Lesson 7.2's distribution failures describe — a load sliding to one side can induce the oversteer that puts you off the road.

So the securing standard isn't paranoia about rare crashes — it's preparation for the ordinary hard stop you'll make dozens of times a year. If your load wouldn't stay put through a genuine emergency brake, it isn't secured, however unlikely a crash feels.

Lesson 7.3.3 — Distribution: Heavy, Low, Forward, Over the Axle

Lesson 7.2 showed that where the weight sits changes handling (understeer/oversteer) and legality (axle limits). Here are the four placement rules that keep a load from steering the vehicle for you:

• Heavy items low. A low centre of gravity resists the roll that tips a vehicle in a corner or a swerve — critical for the higher, narrower vehicles and for anything top-heavy. Heavy on top of light is how loads roll vehicles.
• Heavy items forward — but not too far. Weight over or ahead of the rear axle avoids the tail-heavy oversteer of Lesson 7.2.4; pushed too far forward it creates nose-heavy understeer. The target is balanced, slightly forward of centre.
• Over the axle(s). Concentrating weight between and over the axles — rather than slung far behind the rear axle or far ahead — keeps each axle within its limit (Lesson 7.1.4) and preserves steering feel.
• Spread, not piled. Distributing weight across the load bed rather than stacking it in one spot keeps any single axle legal and the handling predictable.

The unifying image: you're trying to keep the loaded vehicle's balance as close as possible to how it drives empty — because that's the balance the brakes, steering, and tyres were all designed around, and the balance the driver's instincts are calibrated to.

Quick check: Q: You're loading heavy building blocks and light insulation into a pickup. What goes where? A: Heavy blocks low, spread across the bed, positioned over/slightly forward of the rear axle; light insulation on top. Heavy-low-forward-over-the-axle keeps handling near the empty balance and each axle legal.

The Tools: What Works, What Doesn't

What works: ratchet straps (load binders). Purpose-made webbing straps with a ratchet tensioner, rated for a working load. They apply real, measurable, maintainable tension — enough to meet the 80%/50% force rule when correctly rated and anchored to genuine load points. Multiple straps for multiple directions; check them after the first few kilometers (loads settle, tension drops), the same re-check discipline as wheel bolts in Lesson 5.3.

What doesn't: rope, alone, for a heavy load. The common Kenyan practice of tying a pickup load with rope is where theory meets a hard limit: ordinary rope stretches, its knots slip, and it rarely delivers or holds the tension the 80% forward rule demands. Rope may adequately stop light items blowing out, but for a heavy load it gives the appearance of securing without the force to back it — arguably worse than nothing, because it produces false confidence. If the load is heavy enough to hurt someone, it's heavy enough to need rated straps.

Also part of securing: a load cover or net for anything that could blow off (sand, light debris, loose items) — an unsecured light load isn't a projectile into your own cab but it is one into the vehicle behind you. And wedging/blocking heavy items against the headboard and each other so they can't shift, reducing how much work the straps must do.

How Far a Load May Stick Out

A load that projects beyond the vehicle's body is a hazard to others and is regulated by specific Kenyan figures — worth knowing precisely, because this is a common real-world enforcement point (and a common site of both genuine danger and dubious roadside "fines").

Width — the 2.65 m ceiling and the 15 cm side rule. Under the Traffic Act Cap 403, the overall width of the vehicle together with any load projecting beyond it must not exceed 2.65 meters. Separately, a load may not project more than 15 cm beyond the widest point of the vehicle on either side — the rule exists so your side mirrors keep a clear rearward view. Side-protruding loads are where the "you can't see past your own cargo" hazard lives, which is why the side limit is tight.

Length — the rear-overhang rule. For a rigid vehicle the overall length limit is 12.5 meters, and for a pickup specifically, cargo may extend to the rear by up to roughly 60% of the wheelbase length — beyond that you're over the limit regardless of weight. Height-wise, a load may sit above the cabin provided it does not obstruct the windscreen/driver's view.

The "Wide Load" sign — required only when you actually exceed the limits. Here's the practical point KeNHA and the police have had to clarify publicly: the Wide Load sign is not a decoration or a permanent fixture — it is required only when the vehicle is actually carrying a load that exceeds the legal width. Displaying "Wide Load" on an unladen or normally-laden pickup is itself contrary to the law, and — the reason this matters to a driver — carrying an over-width load without proper marking is the real offence. Know which situation you're in: within the limits, no sign and no over-width load; genuinely over-width, you need the abnormal-load route, not just a sign.

Marking a legal protrusion. Where a load legally protrudes (within limits but sticking out — the ladder, the length of timber), it must be made conspicuous so others can judge the vehicle's true extent: a red flag by day, and a red light or reflector at the rear by night or in poor visibility. An unmarked length of timber protruding past the tailgate at dusk is exactly the hazard the marking rule targets — and exactly the common Kenyan sight this lesson wants you never to become.

Quick check: Q: You're carrying iron sheets that stick out 20 cm past the side of your pickup. Legal? A: No — side protrusion beyond 15 cm past the vehicle's widest point is illegal (it also compromises your mirror view). Keep side overhang within 15 cm; the length can extend to the rear (up to ~60% of wheelbase) if marked, but the sides are tightly limited.

Q: Does bolting a permanent "Wide Load" sign to your pickup keep you legal when carrying long cargo? A: No — the sign is only for when you're actually over-width, and displaying it otherwise is itself contrary to the law. It doesn't authorise anything; a genuinely over-width load needs the abnormal-load permit route, and a legal protrusion needs a red flag/light, not a permanent sign.

The Reality

Current context (worth updating as conditions change): the everyday Kenyan load-securing failure is the building-materials pickup — cement, blocks, sand, timber, iron sheets moved short distances around towns and to construction sites, tied with rope or not secured at all, often overloaded and badly distributed. The short-distance, low-speed feel of these trips breeds the false sense that securing "isn't worth it" — but the 80% forward force of a hard stop doesn't care that the trip was only to Kiambu, and a shifting load kills at 40 km/h as readily as at 100. The same applies to loads nobody thinks to secure: the toolbox on the back seat, the gas cylinder in the boot, the sack in the footwell — all projectiles under a hard stop.
If load-securing enforcement and ratchet-strap availability improve, this specific picture eases; the 80%/50% physics never will.

The durable rule beneath the callout: every load, on every trip, secured to survive a hard stop — because the emergency brake is not an exotic event, and an unsecured load is a decision to trust that it won't happen.