Iron built, I can remember when driving a truck meant something today's drivers are a dime a dozen. School bus drivers even worse if you can get a cdl and get the endorsement someone will let you drive. But yet if you want to go on vacation you can rent a 40,000 pound rv and go have fun. Or if you wish they will sale you a house on wheels and will show you how to release the brakes so you can have some fun.I'm sure you have been around it long enough to know what I'm saying and it's sad that people are allowed to drive heavy equipment and no nothing about it. I just feel bad for the families and everybody involved