ASTM A1108:17 pdf download

ASTM A1108:17 pdf download.Standard Test Method for Determining the Ultimate Strength of Deep Corrugated Structural Plate Bolted Longitudinal Lapped Seams.
7.3 Instrumenration—Specimens shall be instrumented with linear variable differential transformers (LVDT), inclinometers, or similar devices capable of recording displacement and rotation, to measure top bearing plate displacement along the length of the specimen and to monitor bolt tipping. The instrumentation used shall be capable of measuring with accuracy better than 0.5% of the deflection or rotation at the ultimate seam strength.
8. Conditioning
8. 1 Condition specimens for a minimum of 4 hours in air, at a temperature of 73 F ± 10 F.
8.2 Conduct test in a room maintained to the same conditioning temperature.
9. Procedure
9.1 Prepare the test specimen in accordance with Annex A 1.
9.2 Record the manufacturer and manufacturer’s product identification, the presence of circumferential seams (if any), the type and size of all bolts and nuts, the nominal corrugation size, nominal plate thickness, conditioning temperature and duration, test temperature, bolt torque, and date of test.
9.3 Record the following measurements for each test specimen:
9.3.1 Determine the pitch and depth (Fig. 1) of one corrugation in each plate segment to the nearest 1/16 in.
9.3.2 Determine the specimen length (Fig. 1) to the nearest I/io in. as an average of three measurements. Take measurements at the base, mid-height, and lop of the specimen.
9.3.3 Determine the specimen height to the nearest ‘/i in. as an average of three measurements. Take measurements at the middle of each plate segment.
9.3.4 Determine the thickness of each of’ the three plate segments to the nearest 0.002 in. by making and averaging three random measurements along each plate segment.
9.4 Place the test specimen in the testing machine, centering the specimen under the load head. The test fixture and load head shall provide uniform support along the top and bottom of the specimen length.
9.5 Assemble and attach all instrumentation to the specimen and tare all instrumentation with the specimen in an unloaded state. Instrumentation shall be provided to record the following measurements:
9.5.1 Load: Record the load with time from the testing machine at a rate not less than one reading every 10 seconds.
9.5.2 Vertical Displacement: Record vertical displacement of the top bearing plate at three locations: at the midpoint of the specimen length; and at the first interior line of bolts at either end (Fig. 1).
9.5.3 Bolt Tipping: Record bolt tipping/rotation as the change in angle of the bolts during testing. Bolt tipping shall he monitored at a minimum of three locations, including one bolt in each of the three plate segments.