{
    "type": "minecraft:crafting_shaped",

    "pattern":
    [
        "BAB",
        "ABA",
        "BAB"
    ],

       "key":
        {
            "A":
            {
                "item": "minecraft:oak_fence"
            },

            "B":
            {
                "item": "minecraft:iron_ingot"
            }
        },

       "result":
       {
            "item": "cm:scaffold_block",
            "count": 16
        }
}