The Rust GuideTHE RUST GUIDE
Deployables·1,500 HP

Large Furnace

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1
1
Cheapest way in
×2
Incendiary Rocket1,375 HP per hit
Sulfur600sulfur ore
Time6sto get in
BenchWB2to craft
1,375 HP per hit · 2 hits on 1,500 HP−1,250 HP overkill
Save 180 sulfurvsIncendiary Rocket1 Incendiary Rocketthen2 F1 Grenadefor the last 125 HP420

Compare tools

11 tools · full bar = 4× the best
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ToolBench
Incendiary RocketWorkbench 2WinnerCheapest sulfurFastest×2600 Best6sBestWB2
F1 GrenadeThrown · Workbench 2×191,140 +90%57s×9.3WB2
High Velocity RocketWorkbench 2×81,600 ×2.743s×7WB2
Satchel ChargeWorkbench 1 · ~8 with duds×62,880 ×4.817s×2.7WB1
Beancan GrenadeThrown · Workbench 1 · ~29 with duds×242,880 ×4.81m 42s×17WB1
Mortar ShellMortar · Workbench 2×113,300 ×5.527s×4.3WB2
Explosive 5.56 Rifle AmmoSemi-Automatic Rifle · Workbench 3×1503,750 ×6.31m 6s×11WB3
Timed Explosive ChargeWorkbench 3×36,600 ×1113s×2.1WB3
RocketWorkbench 3×57,000 ×1225s×4WB3
Propane Explosive BombPlaced · Workbench 2×87,200 ×121m 30s×15WB2
40mm HE GrenadeMultiple Grenade Launcher · Found in lootLoot only×24Loot onlynone28s×4.5Loot

Why ×2?

How the game gets the number
1,500 HP÷1,375 per hit=1.09→ round up →×2

Fire keeps burning after it lands, which the game files don't spell out, so 1,375 HP each is worked out from the burn, not a single hit.

Raw components

for 2× Incendiary Rocket

Intermediates flattened into raw components (gunpowder, explosives, low grade).