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Placing the East wall
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Placing the West wall
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Placing the South wall
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The three portcullises in front of the completed antechamber
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South-view: note the steel rods tying the prefabricated elements
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Support beams for the portcullises
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Wall openings and bearing posts for safe removal of support beams
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Log preparation
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Measurement system: Steel frame, logs and control hoops (red)
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Measurement system: 8-configuration for single rope handling
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Measurement system: loadcells hooked to the frame with pulleys reversing the ropes into the control hoops
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Data acquisition (Peekel) and processing with LabView
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Securing the logs on the eastern recess with wedges
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Fitting the logs in the hollows of the West wall
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Final positions of ropes and portcullises before testing
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Chain-like controller for two ropes, release knot in front
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Fixed ends of ropes from below
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Trumpet entrance of a portcullis: non lubricated
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Trumpet entrance of a portcullis: lubricated with butter
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Just before testing: hanging a portcullis onto the ropes