Corbel For Mac

admin 12/13/2021
Corbel
CategoryHumanist sans-serif
Designer(s)Jeremy Tankard
FoundryMicrosoft
LicenseProprietary
  1. Corbel For Mantel
  2. Corbel Font For Mac
  3. Corbel Maconnerie

Corbel is a humanistsans-seriftypeface designed by Jeremy Tankard for Microsoft and released in 2005. It is part of the ClearType Font Collection, a suite of fonts from various designers released with Windows Vista. All start with the letter C to reflect that they were designed to work well with Microsoft's ClearType text rendering system, a text rendering engine designed to make text clearer to read on LCD monitors. The other fonts in the same group are Calibri, Cambria, Candara, Consolas and Constantia.

Phone - 1-877-550-0600. Email - [email protected] 2510 Stanley Gault Parkway Louisville, KY 40223. Corbel brackets are beak-shaped, prominent on top where they meet the surface they will support, tapering in an arch to the wall below. The name is derived from a Latin cognate for raven and the. Corbel projects. Feel free to experiment, improve on the design or customize the technique to make your corbels suit the project at hand! This particular corbel project was designed to be used with 1”x10” or 1”x12”shelves. I have made available the ready-to-carve Corbel Project (mpc file).

Design[edit]

In a blurb for its use, Corbel was described as 'designed to give an uncluttered, clean appearance on screen. The letter forms are open with soft, flowing curves. It is legible and clear at small sizes. At larger sizes the detailing and style of the shapes is more apparent.' The italic style is a true italic, with influences from serif fonts and calligraphy, with many letters gaining a tail pointing to the right. Many aspects of its design are similar to Calibri and Candara, which are also humanist sans-serif designs; like them it is slightly more condensed than average. Font designer Raph Levien, reviewing it for Typographica, described it as similar to Frutiger.[1] Tankard described his aims in the family's design: “I wanted to move away from theround i-dot sans fonts we've seen a lot of recently. Less cuddly, more assertive. I wanted the italic to be expressive, not a sloped roman.'[2]

Corbel by default renders numbers as text figures (old style or lowercase numerals), which are preferred for integrating figures into running text. This is an uncommon choice in sans-serif faces, especially those designed for display on a screen, but several of the other ClearType fonts also make this the default option; lining figures can be suggested using an OpenType stylistic alternates menu or CSSfont-variant-numeric:lining-nums. Text figures are also found in Microsoft's serif Georgia typeface.

Releases[edit]

It is distributed with Microsoft Excel Viewer, Microsoft PowerPoint Viewer,[3][4] the Microsoft Office Compatibility Pack[5] for Microsoft Windows and the Open XML File Format Converter for Mac.[6]

For use in other operating systems, such as GNU/Linux, cross-platform use and web use it is not available as a freeware and is licensed and sold by Ascender.

References[edit]

  1. ^Levien, Raph. 'Microsoft's ClearType Font Collection: A Fair and Balanced Review'. Typographica. Retrieved 24 November 2014.
  2. ^Now read this: the Microsoft ClearType font collection. Redmond: Microsoft Corporation. 2004. pp. 36-42 etc.
  3. ^'Download Excel Viewer from Official Microsoft Download Center'. Microsoft.
  4. ^'Download PowerPoint Viewer from Official Microsoft Download Center'. Microsoft.
  5. ^'Download Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint File Formats from Official Microsoft Download Center'. Microsoft.
  6. ^'Download Open XML File Format Converter for Mac 1.2.1 from Official Microsoft Download Center'. Microsoft.

External links[edit]

Wikimedia Commons has media related to Corbel.
  • Microsoft Cleartype Font Collection at Microsoft Typography
  • Van Wagener, Anne (2005-02-18). 'The Next Big Thing in Online Type'. Poynter Online. Retrieved 2016-02-17.Cite has empty unknown parameters: curly= and coauthors= (help)


Retrieved from 'https://en.wikipedia.org/w/index.php?title=Corbel_(typeface)&oldid=963163951'

Introduction

Corbel is a short structural element that cantilevers out from column/wall to support load. Generally, the corbel is casted monolithically with column/wall.

There are several typical modes of failure in the corbel. The most common of which are yielding of the tension tie, failure of the end anchorages of the tension tie, either under the load point or in the column, failure of the compression strut by crushing or shearing, and local failures under the bearing plate.

The following figures shows the failure mode of corbel

Design of Corbel

The corbel must be designed to resist simultaneously Vu, a factored moment Mu and a factored horizontal tensile force Nuc. ACI Code Section 11.8 requires corbels having a/d between 1 and 2 to designed using Appendix A, strut-and-tie models, where a is the distance from the load to the face of column and d is the depth of the corbel below the tie, measured at the face of the column. Corbels having a/d less than or equal 1 may be designed using either strut-and-tie models or traditional ACI designed method, Section 11.8. This paper presents Corbels design according to traditional ACI method.

ACI Design Method

Shear Design of Corbel

To avoid the crack that occurs in the interface of the corbel and the column we must provide the shear friction reinforcement perpendicular with the cracks direction. We use coefficient of friction μ to transform the horizontal resisting force into vertical resisting force.

The nominal shear strength of shear reinforcement can be determined using equations below

Vn = Avf fy μ for vertical shear friction reinforcement, and

Vn = Avf fysin αf + cos αf) for inclined shear reinforcement

where

Vn : nominal shear strength of shear friction reinforcement

Avf : area of shear friction reinforcement

fy : yield strength of shear friction reinforcement

μ : coefficient of friction

MethodCoefficient of Friction, μ
Concrete cast monolithic1.4λ
Concrete placed against roughened hardened concrete1.0λ
Concrete placed against unroughened hardened concrete0.6λ
Concrete anchored to structural steel0.7λ

The value of λ is 1.0 for normal weight concrete, 0.85 for sand light weight concrete and 0.75 for all light weight concrete.

The maximum nominal shear force, Vn shall not exceed the smallest of 0.2 fc’ bw d and 5.5 bw d, where

fc’ : compression strength of concrete (MPa)

bw : width of corbel section (mm)

d : effective depth of corbel (mm)

Flexural Design of Corbel

The corbel is designed to resist ultimate flexural moment result from the supported beam reaction, Vu and horizontal force from creep and shrinkage, Nuc. The minimum value of Nuc is 0.2 Vu and not greater than Vu.

Tension Reinforcement

The ultimate horizontal force, Nuc shall be resisted by tension reinforcement as follow

Corbel for corners

An = Nuc / ϕfy

Where:

An : area of tension reinforcement

Nuc : ultimate horizontal force at corbel

fy : yield strength of shear friction reinforcement

ϕ : strength reduction factor

Flexural Reinforcement

The ultimate flexure moment, Mu is

Mu = Vu av + Nuc (h – d)

Where:

Mu : ultimate flexure moment

Vu : ultimate shear force

av : distance from Vu to the face of column

Nuc : ultimate horizontal force at corbel

h : height of corbel

d : effective depth of corbel

Mu ≤ ϕ Af fy (d-a/2) where

a = Af fy / 0.85f’c b

From the equation above, area of flexural reinforcement, Afcan be determined using trial and error. As first trial, (d – a/2) can be assumed 0.9d so that

Af ≥ Mu / ϕ fy (0.9d)

For practical reason, the value of (d – a/2) can be used 0.85d

Af ≥ Mu / ϕ fy (0.85d)

After finding Avf, An, and Af, we must then calculate the primary tension reinforcement Asc from the larger of Af + An and 2Avf/3 + An

Reinforcement Limits

The primary steel reinforcement at corbel design,

Asc shall not be less than 0.04 fc‘ bw d /fy

The horizontal closed stirrups,

Ah shall not be less than 0.5 (Asc – An)

Distribution of Corbel Reinforcement

The horizontal closed stirrups, Ah shall be distributed uniformly within (2/3) d adjacent to primary tension reinforcement.

Design Procedure

Step 1. Find factored shear Vu and tensile force Nuc

If Nuc is not specified, use a minimum value of Nuc = 0.2 Vu(ACI 11.9.3.4)

Compute nominal values of shear and tensile force

Vn = Vu / 0.75 ; Nnc = Nuc / 0.75

If Vn > 0.2 fc’ b d OR

Vn > 5.5 b d then section size is inadequate (ACI 11.9.3.2)

Step 2. Compute shear-friction reinforcement (ACI 11.7.4.1)

Avf = Vn /μ fy

Step 3. Calculate required flexural reinforcement (11.9.3.3)

Mu = Vu av + Nuc (h – d)

Af = Mu / ϕ fy (jd) (assume jd = 0.85d)

Step 4. Reinforcement to carry tensile force (ACI 11.9.3.4)

An = Nuc / ϕfy

Step 5. Required main flexural steel (Asc) is given by (ACI 11.9.3.5 and 11.9.5)

the larger of

Af + An and 2Avf/3 + An

Step 6. Provide closed horizontal stirrups (ACI 11.9.4):

Ah = 0.5 (Asc – An)

Ensure adequate detailing (ACI 11.9.6 & 11.9.7)

Example

Corbel Geometri

Width of corbel, b = 300 mm

Total thickness of corbel, h = 500 mm

Corbel For Mantel

Depth to main reinforcement, d = 450 mm

Material Properties

Yield strength of reinforcement, fy = 415 Mpa

Compressive strength of concrete, fc’ = 35 Mpa

Corbel Font For Mac

Normal weight concrete, λ = 1

Coefficient friction, μ = 1.4 x λ = 1.4

Design Load Data

Factored vertical load, Vu = 370 kN

Distance from face to column, a = 100 mm

Horizontal force, Nu = 75 kN

Strength reduction factor, ϕ = 0.75

Design Procedure

Step 1. Find factored shear Vu and tensile force Nuc

Vu = 370 kN

Nuc_min = 0.2 x 370 = 74 kN

Nuc_act = the larger of 74 kN and 75 kN

= 75 kN

Compute nominal value of shear and tensile force

Vn = 370 / 0.75 = 493.33 kN

Nnc = Nuc / 0.75 = 100 kN

Check section

0.2 x fc’x b x d = 945.0 kN > 493.33 kN

5.5 x b x d = 742.5 kN > 493.33 kN

Section is OK

Step 2. Compute shear-friction reinforcement (ACI 11.7.4.1)

Avf = Vn /μ fy = 493.33 / (1.4×415) = 849.11 mm2

Step 3. Calculate required flexural reinforcement (11.9.3.3)

Mu = Vu av + Nuc (h – d) = 370 x 1000 x 100 + 75 x 1000 (500-450)

Corbel Maconnerie

Af = Mu / ϕ fy (0.85d) =342.28 mm2

Step 4. Reinforcement to carry tensile force (ACI 11.9.3.4)

An = Nuc / ϕfy = 75×1000 / 0.75×415 =240.96 mm2

Step 5. Required main flexural steel (Asc) is given by (ACI 11.9.3.5 and 11.9.5)

Af + An = 342.28 + 240.96 = 583.25 mm2

2Avf/3 + An = 2/3 849.11 + 240.96 = 807.04 mm2

Asc = 807.04 mm2

Use 3 dia 20 bars

Asc_prov = 3 x 314 = 942 mm2

Step 6. Provide closed horizontal stirrups (ACI 11.9.4):

Ah = 0.5 (Asc – An)= 0.5(807.04 – 240.96) =283.04 mm2

Use 3 dia 8 bars

Ah_prov=2×3×50 = 300 mm2

Sh = (2×d/3)/3 = (2×450/3)/3 = 100 mm

Detailed reinforcement