Don't craft these items yet. This is one of the reason why you get stuck on loading and crashes or maybe getting even an broken save game. If you see that you cant get the materials to craft the items in the map ( e.g. You need to travel on the other side so you can get the materials ). DO NOT CRAFT it. If you have something to add, feel free to say something.
Safe
Clan Banner
Radio Tower
Home Brewery
Fishing Rod
S&W Magnum
Dragunov
Zombie Truck
Mi-24 Helicopter
Landmine
C-4 Explosive
Turret
Mortar
Electric Generator
Chemistry Station
Hand Pump
Bear Trap
Kevlar Armor ( Boots, Helmet, Body, Trousers )
Tactical Backpack
Horse Items ( Saddle etc., )
Repair Station
Torture Device
Gunsmith Bench
Assault ( Boots, Helmet, Body, Trousers ) ( Not sure about this one )
Trip Wire Tap
Electronics Lab
Additional: The game has DEV. BLOG and FB Page ( For Updates ) so you can see what items are new or gets available to prevent you getting a broken save game.