These labels are heat sensitive material that turn black if any heat is ever present that is greater than approximately 300 degrees F. The 300 degree F
temperature is used because once aluminum fire ladder materials (6061-T6 alloy) reach this 300 degree F (even if only for a moment), the ladder
material may have lost at least 25% of it's load capacity. This heat exposure effect is not reversible in the ladder and can continue to accumulate
over it's entire life.
NOTE: If any heat sensor label becomes black - remove the ladder from service at once and have the ladder load tested before the ladder is ever
used again. If the ladder passes the load test - you have had a false alarm - replace the heat sensors and return the ladder to service. Replacement
heat sensor labels are only available for ladders that have passed the load test. If the ladder does not pass the test, we will not supply you with
new labels. Call the factory for details.
REMEMBER: Heat sensor labels that look OK do not make the ladder safe to use.
N.F.P.A. now requires 4 heat sensors and one instruction label per ladder section. Each heat sensor has an expiration date printed on them.
Any expired labels must be replaced. Place 2 heat sensor labels below the 2nd rung from the top of each inside rail section (1 on the right inside rail - 1 on the left inside rail).
Place the other 2 heat sensor labels, including one instruction label at the approximate middle point of each inside rail section (1 on the right
inside rail - 1 on the left inside rail with instruction label)
