1. Section detail, third floor, north stair, east -- 2. Section detail, north stair, east at roof drain -- 3. Section detail, first floor window head north stair, west -- 4. Section detail, third floor window head, north stair, west -- 5. Section detail, first floor relieving angle, south stair -- 6. Section detail, at first floor north stair, north -- 7. Section detail at third floor, north stair, north -- 8. Section detail, second floor relieving angle, south stair -- 9. Section detail, third floor window sill, south stair -- 10. Section detail third floor window head, south stair