4.492 Daylighting in Buildings Class01 - MIT OpenCourseWare · 2020-07-09 · Fibreboards Wet...

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Timber Wood as a material Hardwood vs. Softwood Pith, Heartwood, Sapwood: Density and moisture content Anisotropic strength Moisture Content vs. Relative Humidity Relative Humidity Moisture Content 0 0 25 5 50 9 75 14 99 23-30 Tangential section Radial section Horizontal section Growth ring Pith Ray Outer bark Inner bark Cambium Bark Image by MIT OCW.

Transcript of 4.492 Daylighting in Buildings Class01 - MIT OpenCourseWare · 2020-07-09 · Fibreboards Wet...

Page 1: 4.492 Daylighting in Buildings Class01 - MIT OpenCourseWare · 2020-07-09 · Fibreboards Wet method Dry method (Medium Density Fibreboard or MDF) Timber Wood-based products Low-quality

Timber

Wood as a materialHardwood vs. Softwood

Pith, Heartwood, Sapwood:

Density and moisture content

Anisotropic strength

Moisture Content vs. Relative Humidity

Relative Humidity Moisture Content

0 0

25 5

50 9

75 14

99 23-30

Tangential section Radial section

Horizontal section

Growth ring

Pith

Ray

Outerbark

Innerbark

Cambium

Bark

Image by MIT OCW.

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Timber

Wood-based productsLayered products­ Glued laminated timber (glulam)

­ Plywood

Image by MIT OCW.

Inside face

Lamination thickness

Inside faceb

h

12

≤ 3.5mm 1.5 to 1.6 a

=2/5x bb

2a

b

a

a

<=

Image by MIT OCW.

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Timber

Wood-based productsLayered products­ Glued laminated timber (glulam)

­ Plywood

Particleboards­ Chipboard

­ Flakeboard

­ Oriented Strand Board (OSB)

Page 4: 4.492 Daylighting in Buildings Class01 - MIT OpenCourseWare · 2020-07-09 · Fibreboards Wet method Dry method (Medium Density Fibreboard or MDF) Timber Wood-based products Low-quality

Timber

Wood-based productsLayered products­ Glued laminated timber (glulam)

­ Plywood

Particleboards­ Chipboard

­ Flakeboard

­ Oriented Strand Board (OSB)

Fibreboards­ Wet method

­ Dry method (Medium Density Fibreboard or MDF)

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Timber

Wood-based productsLow-quality wood

Isotropic & strong

Free dimensions & openings

Panel construction & "black boxes"

Image by MIT OCW.

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Timber

Timber construction systemsTimber frame construction

Image by MIT OCW.

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Timber

Timber construction systemsTimber frame construction

Balloon frame construction (timber stud construction)

Image by MIT OCW.

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Timber

Timber construction systemsTimber frame construction

Balloon frame construction (timber stud construction)

Platform frame construction

Image by MIT OCW.

Page 9: 4.492 Daylighting in Buildings Class01 - MIT OpenCourseWare · 2020-07-09 · Fibreboards Wet method Dry method (Medium Density Fibreboard or MDF) Timber Wood-based products Low-quality

Timber

Timber construction systemsTimber frame construction

Balloon frame construction (timber stud construction)

Platform frame construction

Panel construction

Image by MIT OCW.

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Timber

Timber construction systemsTimber frame construction

Balloon frame construction (timber stud construction)

Platform frame construction

Panel construction

Bearth-Candinas House by Bearth+Deplazes, 1998

Photographs and floor plans removed due to copyright restrictions.

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Timber

Timber construction systemsTimber frame construction

Balloon frame construction (timber stud construction)

Platform frame construction

Panel construction

Log construction

Image by MIT OCW.

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Timber

Timber construction systemsTimber frame construction

Balloon frame construction (timber stud construction)

Platform frame construction

Panel construction

Log construction

Frame construction

Image by MIT OCW.

Page 13: 4.492 Daylighting in Buildings Class01 - MIT OpenCourseWare · 2020-07-09 · Fibreboards Wet method Dry method (Medium Density Fibreboard or MDF) Timber Wood-based products Low-quality

Timber

Timber construction systemsTimber frame construction

Balloon frame construction (timber stud construction)

Platform frame construction

Panel construction

Log construction

Frame constructionElement

(loadbearing)RafterPurlin, beamSolid-web beamLattice beam

Span 1(m)

Span1(m)

- 8 m4 - 12 m6 - 16 m8 - 20 m

1/18 - 1/301/15 - 1/241/12 - 1/181/18 - 1/15

h*/l0 1 2 3 4 5 6 7 8 9 10 11 1213 1415 16 1819 202122 2324 2517

Depth of beamh (m)

1/10

1/12

1/15

1/18

1/24

1/30

2.001.901.801.701.601.501.401.301.201.101.000.900.800.700.600.500.400.300.200.100.00

*A beam cross-section (h/b = 2/1) can be used for the initial, rough sizing; Glulam beams are often more slender.

Image by MIT OCW.

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Timber

Main reference for lecture contents:“Constructing Architecture” by Deplazes: pp. 77-112

Additional readings relevant to lecture topics:"Fundamentals of Building Construction" by Allen:

&

"Building Construction Illustrated" by Ching & Adams:

chapters on timber and wood construction


Statistical Learning Theory and Applications - mit.edu9.520/spring12/slides/class01/class01.pdf · • Demo of the motion silencing effect Contact: ... - Jeff Miller “Clustering

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4.492 Daylighting in Buildings Class01 · “Introduction to Architectural Science” by Szokolay: § 1.4 (Intro) + § 1.5.1 - 1.5.2 Additional readings relevant to lecture topics:

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4.492 Daylighting in Buildings Class014.492 Special problems in Building Technology Daylighting in Buildings Instructor: Marilyne Andersen Fall 2004 - 09/08/04 Course learning objectives

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