Constructing Your Immersive Engineering Factory
To build your factory, you will utilize various construction blocks, storage solutions, and structural elements. Many machines in Immersive Engineering are large, multiblock constructions that require assembly with an Engineer's Hammer from their component parts, rather than being crafted on a bench. These large machines provide essential industrial support for your operations.
Construction Materials
Metal Constructions
Processed metals are common construction blocks, alongside Treated Wood. All metals can be crafted into blocks and slabs. Metal plates can be made into Sheetmetal, which can be dyed into sixteen different colors. Metal fencing is a fireproof alternative to wooden fencing, useful for containing hot creatures like Blazes or burning undead. Structural Connectors are decorative elements that function similarly to normal connectors. They can be rotated using an Engineer's Hammer and accept rope and wire up to a maximum range of 32 meters, but will not accept normal wires.
Concrete
Concrete is a hard and resistant composite material that is inexpensive to craft and provides a good use for excess slag from steel production. A Stonecutter can be used to cut and assemble concrete into various bricks and pillars. Concrete bricks have the same blast resistance as solid concrete but can be disassembled more quickly. The Stonecutter also produces concrete slabs of varying thickness, as well as concrete stairs and smoother, more polished concrete tiles.
Adding lead plating to concrete increases its resistance to explosions and, more importantly, blocks etheric energies, preventing teleportation by End-creatures, Ender Pearls, and Chorus Fruits. Reinforced concrete, made by shaping liquid concrete around Netherite bars, is highly resistant to powerful explosions, including those from a Wither.
Liquid concrete is produced in a Mixer by combining half a bucket of Water with Gravel, Clay, and two pieces of Sand. When placed on the ground, it spreads like water before solidifying. Placing multiple buckets in key locations can fill a larger area. If the liquid concrete spreads too thinly, it will dry into slabs instead of full blocks. Creatures standing in liquid concrete when it dries will become trapped and unable to move. Liquid concrete can also be loaded into a 
Chemical Thrower to create improvised platforms or immobilize enemies.
Storage Solutions
Silo
Silos provide extensive storage for a single item type, making them ideal for mass storage of items like seeds, slag, or cobblestone. A silo can hold 41472 items, which is equivalent to the capacity of 24 chests. Silos can be built from any Sheetmetal. Items can be placed into the top grate or the bottom port. Items are taken out from the bottom port. Applying a redstone signal to the bottom block will cause the silo to automatically release items. A comparator attached to the bottom center block will emit a redstone signal proportional to the silo's fill level. If a comparator is attached to one of the top 6 layers, the signal will be proportional to the comparator's height. For instance, a comparator on the third layer will not emit a signal until the silo is 2/6 full and will have a signal strength of 15 when the silo is half full or more.
Tank
A Tank is a multiblock structure designed to hold large quantities of fluid, with a capacity of 512 buckets. Any fluid can be piped into the tank via the top or bottom port. Tanks can be constructed from any Sheetmetal. Fluids can only be drawn from the bottom center block. A redstone signal applied to the bottom center block will cause the tank to automatically release fluid. A comparator placed at the bottom center block will emit a redstone signal proportional to the tank's fullness. If a comparator is attached to one of the top 4 layers, the signal will be proportional to the comparator's height. For example, a comparator on the second layer will not emit a signal until the tank is 1/4 full and will have a signal strength of 15 when the tank is half full or more.
Structural Elements
Scaffolding & Ladders
Scaffolding is a versatile structure of metal rods used in construction and can be climbed like ladders. For vertical access in factories and machines, Metal ladders offer a fireproof solution. These ladders can be covered with scaffolding to prevent accidental falls. Metal ladders can be opened by sneaking and right-clicking them with an Engineer's Hammer.
Covers the mod's in-game guide topics: Large Constructions Metal Constructions Concrete Silo Tank Scaffolding & Ladders