46 CFR § 148.51 - Temperature readings.

---
identifier: "/us/cfr/t46/s148.51"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 148.51 - Temperature readings."
title_number: 46
title_name: "Shipping"
section_number: "148.51"
section_name: "Temperature readings."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "N"
subchapter_name: "DANGEROUS CARGOES"
part_number: "148"
part_name: "CARRIAGE OF BULK SOLID MATERIALS THAT REQUIRE SPECIAL HANDLING"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1602; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; 46 U.S.C. 3306, 5111; 49 U.S.C. 5103; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "75 FR 64591, Oct. 19, 2010, unless otherwise noted."
cfr_part: "148"
---


# 148.51 Temperature readings.

When Subpart D of this part sets a temperature limit for loading or transporting a material, apply the following rules:

(a) The temperature of the material must be measured 20 to 36 centimeters (8 to 14 inches) below the surface at 3 meter (10 foot) intervals over the length and width of the stockpile or cargo hold.

(b) The temperature must be measured at every spot in the stockpile or cargo hold that shows evidence of heating.

(c) Before loading or transporting the material, all temperatures measured must be below the temperature limit set in Subpart D of this part.