UL-1897:2015 pdf free download – STANDARD FOR SAFETY Uplift Tests for Roof Covering Systems.
6.4 Repairs or modifications, except to stop air leakage along the periphery, are not to be made to the assembly during the test.
6.5 All vertical movement of the assembly or components of the assembly during the test are to be noted and recorded.
7 Test Procedure — 5 x 9 ft
7.1 A roof system test assembly shall comply with the Conditions of Acceptance 5 x 9 and 10 x 10 Test, Section 8 during and at the conclusion of the 5 x 9 ft test procedure described in 7.2 — 7.8.
7.2 Air is introduced into the pressure vessel until the pressure level reaches 15 lbs/ft2 (0.7 kPa) with a tolerance of +2 lbs/ft2, —0 lbs/ft2 (+0.1 kPa, —0 kPa). The air shall be introduced at a rate that will increase the resulting pressure 1.5 lbs/ft2/sec ±1 lbs/ft2/sec (0.07 kPa/sec ±0.05 kPa/sec). Upon reaching 15 lbs/ft2 (0.7 kPa), the pressure level shall be maintained for a period of 60 sec. The air and clamps shall be permitted to be adjusted as necessary in order to maintain a constant reading. While the sample is being maintained at this pressure level, the sample shall be visually examined to ensure that it continues to meet the conditions of acceptance.
7.3 Upon mutual agreement between the test sponsor and the testing entity, the 15 lbs/ft2 (0.7 kPa) pressure level noted above may be omitted. This results in the initial pressure level being 30 lbs/ft2 (1.4 kPa) with a tolerance of +2 lbs/ft2, —0 lbs/ft2 (+0.1 kPa, —0 kPa).
7.4 After 60 sec, the pressure level shall be increased in 15 lbs/ft2 (0.7 kPa) increments by introducing additional air at the rate and within the tolerance described above. Upon reaching the next 15 lbs/ft2 (0.7 kPa) level, the pressure shall be maintained for a period of 60 sec. The air and clamps shall be permitted to be adjusted as necessary in order to maintain a constant reading. While the sample is being maintained at this pressure level, the sample shall be visually examined to ensure that it continues to meet the conditions of acceptance.
7.5 The procedure described in 7.4 shall be repeated until the sample has maintained a pressure level of 90 lbs/ft2 (4.3 kPa) [+2 lbs/ft2, —0 lbs/ft2 (+0.1 kPa, —0 kPa)] for a period of 60 sec, until failure occurs, until additional pressure levels are unable to be attained or maintained, or at the discretion of the test sponsor. Failure is considered to occur when the conditions of acceptance of this standard are no longer being met or until the pressure level is no longer able to be maintained.
7.6 Repairs or modifications, except to stop air leakage along the periphery, are not to be made to the assembly during the test.
7.7 The test is terminated when the roof system test assembly does not comply with Conditions of Acceptance 5 x 9 and 10 x 10 Test, Section 8, or at the completion of:
a) A designated static pressure difference held for 1 mm where no failure has occurred; or
b) The maximum static pressure difference which was sustained by the equipment for 1 min.