The article supports the 1955 F 9 Säve Nya berget as a 22,000 m² / 236,806 ft² rock aircraft hangar roughly 30 m underground with western and eastern aircraft approaches, an emergency exit and two 80-tonne main doors. It describes a partly freestanding inner structure with a dehumidified air gap and rock inspections, two ship diesels, aircraft turntables, former in-floor fuel lines, sectional foam/water fire suppression and an internal command centre. It gives no tunnel lengths, sections, height, excavated volume, concrete quantity or historic cost.
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Berghangaren
The article-level geometry, cost and systems audit is preserved here even though no source photographs are available in the archive.
6 July 2015 · 0 photographs
Original-article audit
What this source can support
Reviewed 15 August 2026 · geometry completeness 64/100 · Low
The Hangar Rock morphology and inclusive scope are appropriate, and the current SEK 2.183bn base acknowledges low confidence. However, 110,000 m³ is simply 22,000 m² / 236,806 ft² times a 5 m³/m² factor; for a large-span hangar, height and ramp volumes dominate. Protection and aircraft-support packages are area-scaled assumptions. Water/dehumidification, rock-support surface area and heavy doors need explicit lines.
published: 22,000 m² / 236,806 ft² floor area; roughly 30 m rock depth/cover context; two aircraft approaches; two 80-tonne portals; personnel emergency exit; partly freestanding inner building with air gap; four original aircraft turntables | not_published: cavern and ramp lengths; cross-sections/heights; excavated volume; inner-structure concrete; support surface area and class; shaft dimensions
two large ship-diesel generators; dehumidified air gap; rock inspection/maintenance; sectional water and foam sprinklers; fuel distribution lines; aircraft turntables; internal command centre; emergency lighting/photoluminescent markings
large-span excavation and support; ramp/portal geometry; inner building and anchors; fire/foam and hazardous-fuel systems; dehumidification and drainage; heavy standby power; aircraft-support mission systems
One inclusive hangar complex; fuel and command-centre subrecords are component views, not additive assets.
Derive each cavern/ramp from survey length, section and height; price rock support by exposed area and support class; separate freestanding inner structure/anchors; add dehumidification, drainage and rock-maintenance access; supplier-budget 80-tonne portals, generation, foam/fire and aircraft-support systems; keep component records non-additive
survey drawings and cross-sections; clear height and excavation volume; support class and water condition; inner concrete/rebar schedule; portal specification; generator/fire/fuel/mission equipment schedule
area-derived cavern volume remains the dominant input; large-span support is not surface-led; component double-counting risk; current base should be published as a broad band only
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