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How Buildings Work

The Strux Mason

About This Documentation

These docs were generated with AI assistance and are continuously improved.

Let's learn why buildings fall down!

The Big Idea

Blocks are heavy. Heavy things fall down.

A block holds up the blocks above it. Pile on too much, and it gives way — just like you couldn't hold 100 books over your head.

Two Numbers per Block

Every block has two numbers.

Weight — how heavy it is. Iron is heavy, wool is light.

Strength — how much it can hold before breaking. Iron holds 150; glass holds only 5.

See What Blocks to Use for the full table.

When Things Break

The rule is simple:

The Breaking Rule

If the weight on a block is more than its strength... CRASH!

This is fine:

   [STONE]   ← holds 100
   [STONE]   ← only a little weight on it
   [GROUND]


This is NOT fine:

   [STONE]
   [STONE]
   [STONE]
   [STONE]   ← weight of all these: about 150
   [GLASS]   ← glass only holds 5
   [GROUND]      💥 CRASH! 💥

The Domino Effect

When one block breaks, the blocks it was holding up fall too. This is a cascade.

BEFORE:                AFTER:

   [D]                    (gone)
    |
   [C]                    (gone)
    |
   [B] ← break this
    |
   [A]                    [A] (still here!)
    |                      |
 [GROUND]              [GROUND]

B was holding up C and D. When B broke, they had nothing to stand on.

A huge collapse doesn't all happen in one instant — the server finishes it over the next few ticks so nothing is left floating in mid-air.

Building Sideways

Build out from a wall and the first block does the most work.

[WALL]───[1]───[2]───[3]───[4]───[5]
          ↑
     Block 1 holds up 2, 3, 4, and 5!

The longer you build out, the harder block 1 works. Build too far and... SNAP!

Support both ends

A bridge anchored to solid ground at both ends is far stronger than one sticking out from a single side — the two ends share the load: 

[WALL]───[1]───[2]───[3]───[4]───[5]───[WALL]

Thick isn't always stronger

Adding a second block beside a support that is the same distance from the ground doesn't relieve it — that side path carries no load. Only a path that reaches the ground by a shorter route, or actual reinforcement, takes weight off a strained block.

Stress = How Hard a Block Works

"Stress" is how close a block is to its limit.

Stress How the Block Feels
Under 50% Fine, no problem
50–80% Starting to strain
80–95% Danger zone
95–100% About to break — run!

Use /engineer to see these as colored dust on your blocks. It keeps working if you log out and back in — turning it on again shows the dust right away.

If a block you place leaves a nearby block dangerously loaded (but not quite falling), a ⚠ CRITICAL STRESS warning flashes on your action bar — a heads-up to add support before it gives way.

Warning Signs

The game warns you before a block breaks.

Cracks

Blocks crack as they take damage or come under heavy load:

[  BLOCK  ]     ← Healthy (no cracks)
[ ─BLOCK─ ]     ← Hairline cracks (60%)
[ ╱BLOCK╲ ]     ← Clear cracks (78%)
[ ▓BLOCK▓ ]     ← Crumbling — about to break! (90%+)

Sounds

  • Creak = working hard
  • Crack = about to break
  • Loud crack = breaking right now!

Dust

  • Yellow dust = getting stressed (50%+)
  • Orange dust + smoke = danger (80%+)
  • Red dust + flames = run away! (95%+)

Cracks, sounds, and dust are all on by default, and your server admin can tune or turn off any of them.

Keep Learning!