ASTM E73-13 (R2021) pdf free download.Standard Practice for Static Load Testing of Truss Assemblies.
1 .1 This practice is intended as a guide for use in the testing of truss assemblies fabricated from all types of construction materials. While the practice may be used for the testing of a variety of assemblies, it is primarily intended to he used in the testing of those trusses designed to be spaced at 1.2 m centers or greater. It can he used, hut it is not normally intended, for the testing of wood residential trussed rafters. Either proof tests or tests to destruction may be run.
1.2 Limitations—It is not intended that this practice he used for routine quality control testing.
1 .3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1 .4 This standard does 1101 puiport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate Safety health and environmental practices and determine the applicability of regulatory lunitatioiis prior to use.
For specific hazard statements, see Section 7.
4. Summary of Practice
4. 1 This practice outlines the procedures to he followed in the static load testing of major load carrying truss assemblies. While the procedure tells what to do, it does not tell the testing agency how to do it. This leaves the selection of the test fixture and loading medium to the discretion of the testing agency. Materials selection, sampling, conditioning, fabrication, test procedures. and report requirements are covered.
4.2 Two types of tests may be conducted using this practice:
4.2.1 Proof Tests—A proof test is frequently made to provide assurance that the truss will support a stated load or to determine the deformations and structural response under a specified loading.
4.2.2 Test to Failure—In testing to failure, more detailed information is generally desired such as ultimate load carrying capacity, total load-deflection history, yield point, connection performance, factor of safety, etc.
4.2.3 If desired, either type of test may be extended to include a determination of the magnitude and distribution of the stresses in the members and connections in order to permit a more comprehensive analysis of the truss performance.
5. Significance and Use
5.1 This practice provides a guide to any individual, group. agency, or code body on the methods of test for Lruss assemblies fabricated from all types of construction materials. Sample size is generally kept to a minimum to reduce costs.ASTM E73 pdf download.