Those that have fiberglass ladders make sure you inspect for micro cracks at the side rail rungs. I copied this from an article I came across and though it would be helpful. The article did not specify ladder brand or any other details.
Ladder Inspections - Why they are so Important
Two roofing technicians were going on to a flat roof to perform an inspection and repair. The first technician set up a 30 foot extension ladder to access the roof. The ladder was a Type IA Fiberglass ladder rated for a load capacity of 300 pounds. The technician weighed approximately 160 pounds. The ladder had been inspected and was less than 2 months old. The ladder had not been damaged or subjected to any harsh conditions.
As the technician was climbing the ladder he felt the ladder start to give from underneath him. He was able to reach and hold on to the roof edge as the ladder collapsed. The second technician was able to get another ladder from their service truck, set the ladder up and get the first technician down safely without incident.
All fiberglass ladders were immediately brought in from the field and closely examined for any possible defects or damage. The company found that on approximately 20% of their fiberglass extension ladders there were very small cracks in the fiberglass on the side rails immediately next to the rungs of some ladders.
In addition to the small cracks in the fiberglass in some areas the fiberglass material had split.
The small cracks found in the side rails of the extension ladders were not noted to be in any pattern along the side rail. The cracks and splits in the fiberglass were found to be immediately next to the rungs on the outside portion of the side rail.
Currently it is believed the fiberglass may have been damaged or fatigued during the manufacturing process when the rungs were crimped into the side rail of the ladder.
The small cracks around the rungs are not easily detected by a quick visual inspection. Workers need to ‘feel’ with their finger tips for any raised spots in the fiberglass and remove any debris along the side rails in the areas where the rungs are crimped to check for small cracks or splits.
The cracks were not found in any pattern or specific location on all the ladders inspected. It is important to inspect each rung on both the exterior and interior side of the side rail for any signs of cracks or splits in the fiberglass.
Any fiberglass ladder with these small cracks should be removed from service.