The Big Rentals Guide to Towing a Flatbed Trailer in and around Salt Lake City, UT

A flatbed load rides in the open, and in Salt Lake the open road goes up. An open deck means the load and the straps take the mountain sun and wind the whole way, and the way often climbs a Wasatch grade at altitude, where the same weight that rides fine on the valley floor works the brakes on the descent.

Strap it loose and a canyon gust or a hard stop on a grade finds it. Trust a sun-baked strap and it lets go. Drift into the Express Lane and you learn a trailer isn't allowed. This guide covers the flatbed sizes that match real Salt Lake loads, the Utah rules that apply the second you couple up, and the grades, altitude and weather that make a flatbed trailer rental in Salt Lake City its own particular job.

Why Salt Lake City Renters Choose Flatbed Trailers

The Wasatch Front is one of the fastest-growing regions in the country, and flatbeds move the materials the growth runs on — lumber, steel, block, roofing and pallets — to job sites the open deck loads from any side and a forklift reaches from above. Read more about how to haul lumber and building materials on a flatbed trailer.

Mountain and foothills property work adds a steady pull uphill, with materials and compact equipment hauled up to sites that a walled trailer can't load as easily, which runs straight into the grades. Utah's fabrication, mining and industrial base moves steel, pipe and machinery flat, and the state's solar work moves panels and racking. Read more about how to choose the right trailer for a construction haul.

Wherever the load is headed, you'll find trailer rentals across the Salt Lake City area from local owners near you.

Utah Towing Laws Every Flatbed Renter Should Know

Securing an exposed load

This is the rule a flatbed lives and dies by. Utah requires the load secured so nothing can drop, shift, blow or escape, and on an open deck that responsibility is entirely on your chains, binders and straps. Match the hardware to the load — chains and rated binders for equipment and steel, rated straps for materials — and tarp anything loose. Then recheck and retension after the first few miles and again before a big descent, because a grade is exactly where a loose load moves. Read more about how to secure a flatbed load safely.

Brakes and the breakaway

Utah requires brakes on all wheels and a breakaway at 3,000 lb, able to stop the trailer within 40 ft from 20 mph (Utah Code Title 41, Chapter 6a). A loaded flatbed always clears 3,000 lb, and the brakes matter most on a canyon descent, so confirm the trailer's brakes, the breakaway and your tow vehicle's brake controller. Check the gross vehicle weight rating (GVWR) before you book. Read more about what GVWR means and how to read it.

Speed, the Express Lanes and the lanes

Utah sets no separate towing speed limit, so the posted limit applies, but on the mountain corridors the grade sets your real speed well below the sign. A trailer can't use the I-15 Express Lanes even when you're carpooling — the Express Lanes bar trailers and vehicles over 18,000 lb gross weight — and Utah keeps a trailer out of the leftmost general lane on a freeway with three or more lanes in one direction. So keep right and skip the Express Lanes.

Size and license

Width is capped at 102 in, so a wide load of materials or a wide machine needs a UDOT oversize permit — measure the load rather than assuming it fits. Height runs to a generous 14 ft and combination length to 65 ft, both well clear for most flatbed loads, and a standard license covers a personal haul.

Matching a Flatbed to Your Vehicle and Load

Sizing

Common deck lengths run roughly 16 to 24 ft, with deck widths around 8 ft 6 in and a range of weight ratings. A shorter deck handles a materials bundle or a single machine; a longer deck takes a full lumber run, a lift of block or a machine plus its attachments. Read more about choosing the right flatbed size for your load.

Deck height, ramps and tilt

Deck height sets your ramp angle, and a low machine on a tall deck is a problem you want to solve in the yard rather than on the ramps. A tilt deck removes the angle by bringing the bed toward the ground.

Hitch, brake controller and weight distribution, with altitude in mind

Match the trailer's coupler to your ball, confirm the receiver class and a working brake controller, and aim for roughly 60% of the cargo weight forward of the axle center with 10% to 15% on the tongue. Keep heavy material low, and remember thin air cuts the tow vehicle's power, so leave margin on a load you'll take up a canyon.

The Grades, the Altitude and Mountain Weather

Up the grade in thin air

Foothills and canyon jobs mean long climbs on I-15, I-80 and the canyon roads. Going up, a loaded flatbed works the engine and cooling system hard, and thin air means the engine makes less power than it would at sea level, so a rig that felt strong in the valley can labor on a long climb. Plan a lighter load or a stronger truck for a mountain haul, and keep your temperature gauge in view.

Down the grade without cooking the brakes

Going down, gravity plus a heavy load works the brakes, and riding the pedal fades them fast. Downshift and let the engine hold your speed, watch for the runaway-truck ramps that exist because drivers learn this the hard way, and recheck the tie-downs before the descent so nothing shifts once you're committed to the grade.

Sun, wind and the exposed load

Mountain sun and constant UV degrade straps and some materials, and canyon winds catch an open load, so check strap condition and the date code before you rely on them, cover what the sun can damage, add tie-downs where the load is broad, and ease off in a crosswind on an exposed stretch rather than fighting it.

Winter traction

In winter, Utah posts traction requirements on the canyon roads and closes the Cottonwood canyons for avalanche control. A loaded flatbed on a snowy grade is not the place to be caught out, so check UDOT conditions before you head up and don't haul an exposed load over a pass in a storm.

Insurance and Damage Protection

What about insurance and damage protection?

Before towing a rented trailer, contact your auto insurance provider to ask whether your policy covers liability and towing-related damage claims.

Eligible rentals booked through Big Rentals also include Basic Rental Protection at checkout. This added protection can help limit your financial responsibility for certain damage or theft events during the rental period.

For full details on how Basic Rental Protection works, including deductibles, exclusions, and renter responsibilities, review our FAQ and platform terms.

Ready To Book?

Get the right deck for the load, confirm brakes over 3,000 lb, secure the exposed load and check the straps for sun damage, and keep right and out of the Express Lanes. Do that and a flatbed is the most versatile way to move materials and equipment across the valley and up to the sites that need them. When you're ready, browse flatbed trailer rentals in Salt Lake City from local owners near you.

The Short Version

• Flatbeds move Salt Lake's materials and equipment — lumber, steel, block and pallets for the Wasatch Front build, plus mountain-property hauls and steel, industrial and solar loads.
• Secure the exposed load so nothing shifts, blows or escapes, and recheck it before a big descent. On an open deck it's all on your chains, binders and straps.
• A loaded flatbed is always over Utah's 3,000 lb threshold, so all-wheel brakes and a breakaway are a given (Title 41, Chapter 6a).
• No separate towing speed limit, but the grade sets your real speed. A trailer can't use the I-15 Express Lanes or the leftmost general lane, so keep right.
• Downshift on the canyon descents and watch for runaway-truck ramps, and leave altitude margin because thin air cuts your truck's power.
• Mountain sun degrades straps, so check them, and keep about 60% of the weight forward with 10% to 15% on the tongue.