Box truck with sleeper: the berth rules, hours of service and what to check

A box truck with sleeper turns a local truck into one that can run overnight: a bunk behind the seats lets a driver rest legally away from home, or lets a team keep the truck moving. Sleepers come as factory or upfit sleeper cabs, or as separate berth boxes between the cab and the cargo box. Whatever the build, the federal rules for what counts as a sleeper berth are specific, and they matter for both safety and hours of service. This guide covers them, plus what a sleeper means for payload, licensing and the loads you can take.

Types of sleeper box trucks

• Sleeper cab box truck: a cab built or modified with a bunk behind the seats, the same way a semi tractor's sleeper works. A box truck with sleeper cab keeps the bunk inside the cab structure.
• Berth box behind the cab: a separate compartment mounted between the cab and the cargo box, connected to the cab. A small, low version of this is what drivers call a coffin sleeper truck.
• Berth inside the cargo box: allowed only if it is securely walled off from the cargo and sits immediately next to the cab.

SOURCE:eCFR, 49 CFR 393.76, OCT 2026

A straight truck with sleeper is the same idea on any straight-truck body, from box to flatbed.

The federal sleeper berth checklist

49 CFR 393.76 sets the standard a sleeper berth must meet. For a berth installed after September 30, 1975, here is what to measure and check:

SOURCE:eCFR, 49 CFR 393.76, OCT 2026

Take a tape measure to any 26 ft box truck sleeper interior before you buy. A bunk that is a few inches short, has a narrow opening into the cab or lacks a restraint is a bed, not a sleeper berth under the rules.

Hours of service and the sleeper berth

A sleeper does more than give you somewhere to sleep. For drivers of commercial motor vehicles under the federal hours-of-service rules, a compliant sleeper berth opens the sleeper berth split: two rest periods, neither shorter than 2 hours, one of them at least 7 consecutive hours in the berth, adding up to at least 10 hours. That flexibility can make the difference on long runs with fixed delivery times.

SOURCE:eCFR, 49 CFR 395.1(g)(1), OCT 2026;eCFR, 49 CFR 395.1(e), OCT 2026

Do not assume a non-CDL truck escapes these rules. A truck rated 10,001 lb or more used in interstate commerce is a commercial motor vehicle, CDL or not, so a non-CDL box truck with sleeper doing interstate work runs on the same hours-of-service rules. The split sleeper berth calculator works through the timing.

SOURCE:eCFR, 49 CFR 390.5, OCT 2026

Non-CDL 26 ft box truck with sleeper

If you want the biggest box you can drive without a CDL, with a bunk, the rating is the number to watch. The CDL line is 26,001 lb GVWR, so a non-CDL 26 ft box truck with sleeper is one rated 26,000 lb or less. U-Haul's 26 ft truck, for comparison, is rated 25,999 lb and weighs 13,140 lb empty, without a sleeper.

SOURCE:eCFR, 49 CFR 383.5, OCT 2026;U-Haul (page snapshot 2026-09-28, Internet Archive), OCT 2026

Every pound of sleeper, mattress, insulation and gear comes out of payload, because the rating does not change. If you are buying a converted truck, weigh it with the sleeper installed and subtract from the GVWR to learn what freight it can really carry.

What to check before buying

1. Berth dimensions and exit, against the checklist above.
2. Restraint, fitted and in good condition.
3. Installation: how the berth or sleeper cab is attached, and who built it. Ask for documentation.
4. Ventilation and climate: louvers, and how the berth is heated or cooled when parked.
5. Weight: a scale ticket with the sleeper in place, against the GVWR.
6. Records for the truck itself; see our used box truck guide.

Box sizes are on the box truck sizes chart and builds in box truck types. New to the subject? Start with what a box truck is. The truck size calculator checks loads against a box.

What a sleeper means for the loads you book

A sleeper berth truck can take longer runs and multi-day trips instead of returning home each night, and a team can keep it moving. It also adds a planning problem: hours, rest stops and parking all have to line up with pickup and delivery windows.

SOURCE:eCFR, 49 CFR 393.76, OCT 2026;eCFR, 49 CFR 395.1(g)(1), OCT 2026;eCFR, 49 CFR 395.1(e), OCT 2026;eCFR, 49 CFR 390.5, OCT 2026;eCFR, 49 CFR 383.5, OCT 2026;U-Haul (page snapshot 2026-09-28, Internet Archive), OCT 2026

Questions box truck owners ask

Q-01Can a box truck have a sleeper?

Yes. Sleepers are added to straight trucks either as a factory or upfit sleeper cab or as a separate berth box mounted between the cab and the cargo box. Federal rules require the berth to be in the cab or immediately next to it, securely fixed, and walled off from cargo if it sits in the cargo space.

Q-02What is a coffin sleeper?

Trucker slang for a small, low sleeper compartment behind the cab, just big enough to lie down in. For it to count as a sleeper berth under federal rules, it still has to meet the minimum dimensions, exit, ventilation and equipment requirements in 49 CFR 393.76.

Q-03Do you need a CDL for a box truck with a sleeper?

Only if the truck is rated 26,001 lb GVWR or more, or hauls placarded hazmat. The sleeper adds weight, which comes out of payload, but it does not change the rating on the sticker. A non-CDL 26 ft box truck with sleeper is one rated 26,000 lb or less.

Q-04Can I use the sleeper berth split in a box truck?

If you drive a commercial motor vehicle under the federal hours-of-service rules and the truck has a sleeper berth that meets the standard, yes. The split pairs two rest periods, one of at least 7 consecutive hours in the berth, that together total at least 10. Our split sleeper calculator works through the timing.