Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO PP 74:2019
• Năm ban hành / Publication date: 2019
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Practice for Determination of Size and Shape of Glass Beads Used in Traffic Markings by Means of Computerized Optical Method
• Thay thế cho / Replace: AASHTO PP 74:2013
• Số trang / Page: 12

Phạm vi áp dụng / Scope of standard

This practice describes measuring size and shape of translucent glass beads used in traffic markings with computerized optical equipment. This practice is intended for glass beads from 0.15 mm to 2.35 mm in diameter.

This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this procedure to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to its use.