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SF Distributors

Freight resources

Useful freight knowledge, not generic logistics filler.

Straight answers to the questions that come up most often before an LTL shipment moves. This is general freight guidance — for anything specific to your shipment, a real person is one message away.

How freight class affects an LTL rate

LTL carriers price freight using the NMFC (National Motor Freight Classification) system, which assigns a class from 50 to 500 based mainly on density, along with handling, stowability, and liability. Lower classes (denser, easier-to-handle freight) generally cost less to ship than higher classes (bulky, fragile, or hard-to-stack freight) at the same weight. Getting the class wrong — even honestly — can trigger a carrier reclassification and a corrected invoice after pickup, which is why confirming class before booking matters more than it looks like it should.

Why dimensions matter

Carriers build trailer plans around cubic space, not just weight. Accurate length, width, and height per handling unit let a carrier (and a broker) calculate density, catch a freight class that doesn't match the commodity, and avoid a dimension-based reweigh/rebill after the shipment has already moved. Rounding dimensions down 'to be safe' usually backfires — it just moves the correction to after pickup, when it's harder to resolve.

What counts as limited access?

Limited-access locations are pickup or delivery points that need extra time or equipment beyond a standard dock delivery — think churches, schools, storage facilities, construction sites, farms, military bases, or residences. Carriers charge an accessorial for limited access because these stops take longer and often require a smaller truck or extra coordination. Flagging a limited-access location when booking avoids a surprise fee (and a failed delivery attempt) later.

Why an LTL quote can change

An LTL quote is only as accurate as the shipment details it's built from. The price most commonly changes after pickup because of a freight class correction, a weight or dimension discrepancy found during carrier inspection, or an accessorial (liftgate, residential, inside delivery, limited access) that wasn't included in the original request. None of these are hidden fees — they're the carrier's tariff catching up to what actually shipped versus what was originally described.

What happens during a reconsignment?

A reconsignment changes the delivery details on freight that's already moving — a new consignee, a new delivery address, or a hold-for-pickup instead of a scheduled delivery. Carriers treat this as a change to an in-progress shipment, so it typically carries its own accessorial charge and can add transit time, since the shipment may need to be rerouted through a different service center. Reconsignments are handled shipment-by-shipment; the earlier a change is requested, the more delivery options usually remain.

Preparing an LTL shipment for pickup

A smooth pickup starts with a compliant pallet (nothing overhanging the edges), clear and durable labeling on multiple sides of each handling unit, freight that's stable and shrink-wrapped or banded, and paperwork (BOL) that matches what's actually on the dock — same piece count, weight, and commodity description. Mismatches between the BOL and the physical freight are one of the most common causes of a delayed pickup or an after-the-fact rate correction.

Have a shipment-specific question?

General guidance only goes so far. Tell us about the actual freight and we'll work the specifics with you.