Supports the following standards: ASTM C293, ASTM C78, AASHTO T177 Humboldt‘s Portable, Concrete Beam Testers with Micro-pumps are a great quality control tool for contractors, DOTs and consultants for quickly and accurately determining flexural strengths of concrete using 6" x 6" cross-section test beams. These Beam Breakers are hydraulically driven units using the center-point loading method and provide continuous readings to the beam breaking point while retaining the maximum reading for accuracy and to eliminate lost data. The gauge also resets to zero for testing multiple beams. These beam breakers are constructed of lightweight aluminum, making them extremely portable for use at even the most remote of job sites. Self-contained, portable concrete beam tester, which accurately and easily determines flexural strengths of 6" x 6" test beams of 16" and 18" lengths. The H-3030CL is a single-point tester for 16" beams The H-3032CL is a single-point tester for 18" beams The H-3033CL is a third-point tester for 18" beams