ASTM D4632/D4632M-15 pdf free.Standard Test Method for Grab Breaking Load and Elongation of Geotextiles. ASTM D4632/D4632M is an index test which provides a procedure for determining the breaking load (grab strength) and elongation (grab elongation) of geotextiles using the grab method. This test method is not suitable for knitted fabrics and alternate test methods should be used. While useful for...