Yett
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A yett (derived from the Old English and Scots word for "gate") is a hinged, latticed wrought-iron gate or grille used for defensive fortification in medieval castles and tower houses. Predominantly found in Scotland, yetts provided a fireproof, durable barrier at castle entrances alongside or behind traditional wooden doors. The defining feature of a yett is its incredibly rigid, interwoven structural engineering. The yett was a highly deliberate component of a castle's layered entry security system.
Design and Construction:
"Through-and-Through" Weaving: Unlike modern grilles where bars are welded or riveted on top of one another, a yett utilizes an alternate penetration method. A single vertical bar will pass through a horizontal bar, but at the next intersection, the horizontal bar will pass through the vertical one. This alternating matrix makes it mathematically and physically impossible to dismantle or pull apart by removing individual bars.
Harr-Hung Movement: Unlike a portcullis, which moves vertically using cumbersome pulleys, ropes, and counterweights, a yett is hinged like a traditional door. They were usually "harr-hung," meaning they rotated on heavy iron pivots integrated directly into the stone headers and sills of the gateway.
Wood Reinforcement: In many instances—particularly along the English-Scottish border—the iron latticework was reinforced with massive oak planks riveted directly to the iron to prevent arrows, smoke, or small projectiles from passing through.
Defensive Function:
Fireproofing the Entrance: Castles usually featured a massive wooden outer door. Attackers frequently attempted to burn these down using brushwood. The yett was typically placed immediately behind or in front of the wooden door. If the wooden door was reduced to ash, the iron yett remained completely unaffected, leaving the gateway securely blocked.
Two-Way Combat: Because it was a lattice grille, defenders could stand safely behind the locked yett and fire muskets, bows, or crossbows directly at the enemy trying to breach the threshold.
Locking Mechanisms: Yetts were secured from the inside using heavy iron bolts or by sliding massive wooden drawbars out from deep tunnels carved into the thickness of the stone walls. Some were pulled closed using chains operated by a guard in an adjacent porter's lodge.
Design and Construction:
"Through-and-Through" Weaving: Unlike modern grilles where bars are welded or riveted on top of one another, a yett utilizes an alternate penetration method. A single vertical bar will pass through a horizontal bar, but at the next intersection, the horizontal bar will pass through the vertical one. This alternating matrix makes it mathematically and physically impossible to dismantle or pull apart by removing individual bars.
Harr-Hung Movement: Unlike a portcullis, which moves vertically using cumbersome pulleys, ropes, and counterweights, a yett is hinged like a traditional door. They were usually "harr-hung," meaning they rotated on heavy iron pivots integrated directly into the stone headers and sills of the gateway.
Wood Reinforcement: In many instances—particularly along the English-Scottish border—the iron latticework was reinforced with massive oak planks riveted directly to the iron to prevent arrows, smoke, or small projectiles from passing through.
Defensive Function:
Fireproofing the Entrance: Castles usually featured a massive wooden outer door. Attackers frequently attempted to burn these down using brushwood. The yett was typically placed immediately behind or in front of the wooden door. If the wooden door was reduced to ash, the iron yett remained completely unaffected, leaving the gateway securely blocked.
Two-Way Combat: Because it was a lattice grille, defenders could stand safely behind the locked yett and fire muskets, bows, or crossbows directly at the enemy trying to breach the threshold.
Locking Mechanisms: Yetts were secured from the inside using heavy iron bolts or by sliding massive wooden drawbars out from deep tunnels carved into the thickness of the stone walls. Some were pulled closed using chains operated by a guard in an adjacent porter's lodge.