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Stair design and construction Brisbane City Hall staircase Brisbane North Point Institute of TAFE Certificate 3 in Stonema...
Stair facts <ul><li>In February 2003, Canberra’s Paul Crake won the Empire State Building ‘run-up’ for the fifth consecuti...
<ul><li>That’s  </li></ul><ul><li>3.52m per level </li></ul><ul><li>Average 18.3 steps per level </li></ul><ul><li>192.25m...
Stair geometry <ul><li>Stair safety and geometry are related- rhythmic movement along a straight line is important for saf...
Stair proportions <ul><li>Imperial  (feet and inches) </li></ul><ul><li>Rise (R)  ≥  6”; Going (G)  ≤  12” </li></ul><ul><...
Stair angles <ul><li>According to AS 1657-1992 (Fixed platforms, walkways, stairways & ladders- Design, construction & ins...
Limits of slope AS 1657-1992 fig 1.1 AS 1657-1992 Fixed platforms, walkways, stairways & ladders- Design, construction & i...
Stairway rises & goings AS 1657-1992 fig. 4.3 AS 1657-1992 Fixed platforms, walkways, stairways & ladders- Design, constru...
Stair words <ul><li>Baluster </li></ul><ul><li>Balustrade </li></ul><ul><li>Go </li></ul><ul><li>Going </li></ul><ul><li>H...
Stair type 1 <ul><li>Straight flight stair </li></ul><ul><li>4.1 Stairways >600mm between handrails </li></ul><ul><li>4.1 ...
<ul><li>Straight two-flight stair with half-landing </li></ul><ul><li>4.2.1 stairs constructed in flights straight or curv...
<ul><li>Quarter-turn stair with landing </li></ul><ul><li>4.3.1 All treads to be slip resistant ,  with provision made for...
<ul><li>Dogleg stair with half-landing </li></ul><ul><li>4.3.2 Head clearance min 2000mm vertically from nosing of tread <...
<ul><li>Open-well stair with two quarter landings </li></ul><ul><li>4.3.1 (b) Each rise not less than 150mm & not more tha...
<ul><li>Quarter-turn stair with winders </li></ul><ul><ul><li>4.4 Landings: </li></ul></ul><ul><ul><ul><li>(a)    Length &...
<ul><li>Spiral stair with central column </li></ul><ul><li>4.2.3 Radius to centre line of stairway not less than 600mm; wh...
<ul><li>Circular stair with central well </li></ul><ul><li>4.3.1 (c) Each Going not less than 215mm & not more than 305mm ...
<ul><li>Geometric stair (90 0 ) turn </li></ul><ul><li>4.3.1 (d) 45 000< RxG <48 000 </li></ul><ul><li>4.3.1 (e) Tread wid...
THE END
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Stair Construction

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Stair geometry

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Transcript of "Stair Construction"

  1. 1. Stair design and construction Brisbane City Hall staircase Brisbane North Point Institute of TAFE Certificate 3 in Stonemasonry BCF3027A Lay stair & floor surfaces
  2. 2. Stair facts <ul><li>In February 2003, Canberra’s Paul Crake won the Empire State Building ‘run-up’ for the fifth consecutive time </li></ul><ul><li>He ran up </li></ul><ul><li>86 levels </li></ul><ul><li>1576 stairs </li></ul><ul><li>Rising 303m from start to finish </li></ul><ul><li>in 9 minutes 33 seconds! </li></ul>
  3. 3. <ul><li>That’s </li></ul><ul><li>3.52m per level </li></ul><ul><li>Average 18.3 steps per level </li></ul><ul><li>192.25mm per step </li></ul>Stair facts Paul ascended 1576 steps through 86 levels to rise 303m
  4. 4. Stair geometry <ul><li>Stair safety and geometry are related- rhythmic movement along a straight line is important for safe ascent or descent </li></ul>Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  5. 5. Stair proportions <ul><li>Imperial (feet and inches) </li></ul><ul><li>Rise (R) ≥ 6”; Going (G) ≤ 12” </li></ul><ul><li>2R” + G” = 23” </li></ul><ul><li>17” ≤ (R” + G”) ≤ 17.5” </li></ul><ul><li>70” ≤ (R” x G”) ≤ 75” </li></ul><ul><li>Metric </li></ul><ul><li>150mm ≤ R ≤ 215mm; 215mm ≤ G ≤ 305mm </li></ul><ul><li>45 000 ≤ (Rmm x Gmm) ≤ 48 000 </li></ul>
  6. 6. Stair angles <ul><li>According to AS 1657-1992 (Fixed platforms, walkways, stairways & ladders- Design, construction & installation), stairways should be angled between 26.5 0 and 45 0 - </li></ul><ul><li>That’s between 1 in 2 and 1 in 1 </li></ul>26.5 0 45 0 Rise = 1 Going = 2 Rise = 1 Going = 1
  7. 7. Limits of slope AS 1657-1992 fig 1.1 AS 1657-1992 Fixed platforms, walkways, stairways & ladders- Design, construction & installation (p 5)
  8. 8. Stairway rises & goings AS 1657-1992 fig. 4.3 AS 1657-1992 Fixed platforms, walkways, stairways & ladders- Design, construction & installation (p 14)
  9. 9. Stair words <ul><li>Baluster </li></ul><ul><li>Balustrade </li></ul><ul><li>Go </li></ul><ul><li>Going </li></ul><ul><li>Handrail </li></ul><ul><li>Headroom </li></ul><ul><li>Rise </li></ul><ul><li>Riser </li></ul><ul><li>Stair </li></ul><ul><li>Step </li></ul><ul><li>Tread </li></ul><ul><li>Wall string </li></ul><ul><li>Landing </li></ul><ul><li>Newel post </li></ul><ul><li>Nosing </li></ul><ul><li>Outer string </li></ul><ul><li>Pitch </li></ul><ul><li>Pitch line </li></ul>
  10. 10. Stair type 1 <ul><li>Straight flight stair </li></ul><ul><li>4.1 Stairways >600mm between handrails </li></ul><ul><li>4.1 Slope not less than 26.5 0 & not more than 45 0 </li></ul>Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  11. 11. <ul><li>Straight two-flight stair with half-landing </li></ul><ul><li>4.2.1 stairs constructed in flights straight or curved horizontally </li></ul><ul><li>4.2.2 Number of rises not to exceed 18 in a flight; not more than 36 rises without a change in direction </li></ul>Stair type 2 Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  12. 12. <ul><li>Quarter-turn stair with landing </li></ul><ul><li>4.3.1 All treads to be slip resistant , with provision made for drainage </li></ul><ul><li>4.3.1 (a) Rises & goings (in the same flight) to be within ± 5mm </li></ul>Stair type 3 Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  13. 13. <ul><li>Dogleg stair with half-landing </li></ul><ul><li>4.3.2 Head clearance min 2000mm vertically from nosing of tread </li></ul><ul><li>4.3.3 Nosing of tread must be highlighted </li></ul>Stair type 4 Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  14. 14. <ul><li>Open-well stair with two quarter landings </li></ul><ul><li>4.3.1 (b) Each rise not less than 150mm & not more than 215mm </li></ul><ul><li>4.3.1 (c) Each going not less than 215mm & not more than 305mm </li></ul>Stair type 5 Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  15. 15. <ul><li>Quarter-turn stair with winders </li></ul><ul><ul><li>4.4 Landings: </li></ul></ul><ul><ul><ul><li>(a)   Length & width must be not less than the stairway </li></ul></ul></ul><ul><ul><ul><li>(b)    Landing minimum vertical clearance 2000mm </li></ul></ul></ul><ul><ul><ul><li>(c) Every access landing- standing space at least 600mm clear of cross-traffic or door swing </li></ul></ul></ul>Stair type 6 Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  16. 16. <ul><li>Spiral stair with central column </li></ul><ul><li>4.2.3 Radius to centre line of stairway not less than 600mm; where radius to centre line is less than 3000mm, maximum width of curved stairway 750mm </li></ul>Stair type 7 Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  17. 17. <ul><li>Circular stair with central well </li></ul><ul><li>4.3.1 (c) Each Going not less than 215mm & not more than 305mm </li></ul>Stair type 8 Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  18. 18. <ul><li>Geometric stair (90 0 ) turn </li></ul><ul><li>4.3.1 (d) 45 000< RxG <48 000 </li></ul><ul><li>4.3.1 (e) Tread width must not be less than the going and there must be an overhang of at least 10mm </li></ul>Stair type 9 Milton, H.J. (1994). Glossary of Building Terms. Standards Australia, Sydney (p 364)
  19. 19. THE END
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