During installation of the 4' x 8' SafeRacks, I discovered that the ceiling joists in my garage are 2x4 trusses, instead of solid joists. Unfortunately, the product comes with 3" lag bolts, and after consulting with their customer service, they insist that I need at least 2" of solid wood penetration (the ceiling truss would only provide 1.5").
Would it be acceptable to substitute the 3" lag bolt with 2x 2" lag bolts per location? The product is rated to hold 600lb, and I doubt I would utilize the full weight capacity. At the same time, I don't want to put my family at any safety risks.
EDIT: Thank you for your comments so far. I really appreciate your responses! Here is a picture of my garage ceiling, prior to drywall being installed.
8/27 EDIT: Given the expert advice here, I have decided to return the racks. I'm going to look for shelving that are mounted on the sidewalls. I'm very glad that I found this site. Thank you - you guys rock!