structures in practice - mark stephens architects€¦ · joist slabs – cast in moulds rule of...
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![Page 1: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/1.jpg)
Structures in Practice
![Page 2: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/2.jpg)
![Page 3: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/3.jpg)
![Page 4: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/4.jpg)
One Way Slabs (cast in place)
![Page 5: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/5.jpg)
Rule of Thumbs: • Beam depth = Span / 16 • Beam Width = 1/3 – ½ of beam depth • Slab thickness = Span / 28 for floor slabs (min 100mm : Span /35 for roof slabs Max span = 1.8 – 5.5m
One Way Slabs (cast in place)
![Page 6: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/6.jpg)
Joist Slabs – Cast in moulds
![Page 7: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/7.jpg)
Joist Slabs – Cast in moulds
Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist width
![Page 8: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/8.jpg)
Flat Plates
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Flat Plates
Rule of Thumbs: • Spans : 3.6 – 9.1m • Slab depth = span/30 (125-305mm)
![Page 10: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/10.jpg)
Flat slabs – (thickened at column supports)
![Page 11: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/11.jpg)
Flat slabs – (thickened at column supports)
Rule of Thumbs: • Spans : 6-12m • Slab depth = span/25 (150mm-305mm)
![Page 12: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/12.jpg)
2 way slabs with beams
![Page 13: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/13.jpg)
2 way slabs with beams
Rule of Thumbs: • Spans : 4.6-9.1m • Slab depth = span/16 (perimeter=180mm, slab=100mm)
![Page 14: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/14.jpg)
Waffle slabs
![Page 15: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/15.jpg)
Waffle slabs
Rule of Thumbs: • Spans : 7.3-12.2m • Slab depth = 75-115mm • Total depth = span/24 • rib width = 125mm-150mm
![Page 16: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/16.jpg)
Pre cast concrete slabs
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Pre cast concrete slabs
Rule of Thumbs: • 1200 typical width • 3.6m-11.6m span Depth = span/40 Beam depth = Span/16 (includes slab depth) Beam width = same as column Solid slabs span = 3.6m-7.3m) Depth = span/40
![Page 18: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/18.jpg)
Steel beams
Rule of Thumbs: • Steel beams span 6-12m • Depth = span /20 Beam width = 1/3 – ½ beam depth
![Page 19: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/19.jpg)
Open web steel joists
Rule of Thumbs: • Spans >10m • 0.6 – 3m spacing (1.2m common) • Long span (LH) joists 455-1220mm deep) • Deep long span (DLH) 1320mm-1830mm deep
![Page 20: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/20.jpg)
One-way beam system
Rule of Thumbs: • Spans 6-12m
![Page 21: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/21.jpg)
Beam & girder system
Rule of Thumbs: • Spans 6-12m • Secondary beams = 7-20m
![Page 22: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/22.jpg)
Trussed system
Rule of Thumbs: • 3.6m – 18m span)
![Page 23: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/23.jpg)
Triple layer system
Rule of Thumbs: • 3.6m – 18m span
![Page 24: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/24.jpg)
Wood
Rule of Thumbs: Solid: depth = span/15 Beam width = 1/3 – ½ depth Others: Depth = Span/20 Width = ¼ - 1/3 beam depth
Solid timber Glulam /Parallel strand laminated veneer
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Pre fabricated I joists
Rule of Thumbs: 4.9 -18.3m spans Depth = Span / 18
![Page 26: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/26.jpg)
Pre fabricated I joists
![Page 27: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/27.jpg)
Pre fabricated Wood trussed joists
Rule of Thumbs: 4.9 -18.3m spans Depth = Span / 18
![Page 28: Structures in Practice - MARK STEPHENS ARCHITECTS€¦ · Joist Slabs – Cast in moulds Rule of Thumbs: • 75mm-115mm slab depth • Depth (total) = span/24 • 125-230mm joist](https://reader034.vdocuments.us/reader034/viewer/2022052020/6034186c8751f2497a22bda2/html5/thumbnails/28.jpg)
Space for Services
Rule of Thumbs: • Allow 455mm below deepest portion of floor for services.