Outrigger Loads - Fire Truck Elevated Surfaces

[Bhamstructural]

Has anyone had to take into consideration the out rigger loads of a fire truck when designing an elevated surface. The best thing I have found is the Austin, TX Fire Code 2021 (503.2.6.1) states:
"Where an elevated surface or structure or portions of a structure are subject to operational loads with deployment of outriggers utilizing a crane, lift or ladder, the structure shall be designed and maintained to support the following independent static loading conditions as required and approved by the fire chief: 1) a load of 43,200 pounds on one outrigger and 2) a load of 28,600 pounds on each of two adjacent outriggers with 18 feet of separation on centers (the total load is 57,200 pounds). The contact area of each outrigger is 24 inches x 24 inches. In addition to verifying that special inspections per the Building Code, the design engineer of record shall make periodic construction observations and upon substantial competition of the work, the design engineer shall provide the fire chief an engineer's letter of concurrence that the work and materials were installed in substantial conformance with the fire chief's record document."

Does anyone have any experience with this design check? Would like to know if there is a standard code requirement (I'm not located in Austin, TX).

 

[jhnblgr]

More information is required, what is this being applied to? This should be limited to suspended slabs that will see traffic. Most structures in the roadway are designed to hl-93.

 

[Lomarandil]

Outrigger weights and spacings will vary per fire truck. I'm not aware of a general/standardized requirement