A look at explosives and bombs ratings

[Marcello]

The standard WinSPMBT Booby Trap is apparently a weak 120mm mortar round (1/2 the HEK).

Booby traps are can be made out of pretty much anything, so it would be hard to settle on a right value. Perhaps it could be built around hand grenade value, as it would be the most easy/common item, but no big deal.

Your average IED is a Fertilizer Bomb ... and an impressive bomb it is !
It compares VERY favorably to the standard 1000kg aerial bomb

The name should not be taken too literally, it could be that or something else. There have been quite a few massive IED used in Iraq, made with multiple heavy shells (240/155/152mm) linked together and buried, powerful enough to rip apart an Abrams and send its turret flying away. I had proposed the addition of an intermediate size IED to simulate the more common types (one or two arty shells emplaced near the road) but the big bang types have been definitively been used.