File:Wall decoration and insulation with Masonry Veneer.jpg
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Summary
[edit]DescriptionWall decoration and insulation with Masonry Veneer.jpg |
English: Masonry veneer walls consist of a single non-structural external layer of masonry work, typically brick, backed by an air space. The innermost element is usually structural wall, and may consist of wood or metal frame within the Cavity wall (where inner and outer layers are both structural) while others are distinct to masonry veneer walls
• The airspace functions as a drainage plane, allowing any water that has penetrated the veneer to drain to the bottom of the cavity, where it encounters flashing (weatherproofing) and is directed to the outside through weep holes, rather than entering the building. • The structural framing or masonry backup can be erected first to allow the rest of the building structure to be completed concurrently with the outer veneer, rather than waiting for the entire wall structure to be completed before proceeding with the roof and upper floors. • A masonry veneer wall can be completed in a shorter time with less labor than a solid masonry wall thus saving in cost. • The weight of a veneer wall can be significantly less than solid masonry, resulting in economies in foundations and structural support. SupportBecause the masonry veneer is non-structural, it must be tied back to the building structure to prevent movement under wind and earthquake loads. This is usually accomplished by a means that does not interrupt the drainage plane and does not compromise cavity insulation. Brick ties are used for this purpose, and may take the form of corrugated metal straps nailed or screwed to the structural framing, or as wire extensions to horizontal joint reinforcement in a fully masonry veneer system. Although the veneer is vertically self-supporting, shelf angles are often used in multi-story buildings, typically at floor edges, to provide a horizontal expansion joint that allows expansion of the brick and potential shrinkage of the frame. In multi-story buildings, such a system may be called a curtain wall. MaterialsMasonry veneers can be made of any concrete, manufactured clay, polyurethane, artificial stone or natural stone product. Typically, masonry refers to individual units that are placed in a mortar bed, making a distinction with panelized products. If a masonry veneer is used over a framed wall, sheathing and a moisture barrier are required to assure the weather tightness of the assembly. Rain screensA variant on masonry veneer is the rain screen veneer. Rain screens are ventilated at the top and bottom of the cavity to prevent wind-driven rain from being driven into the building by unbalanced pressure. Such systems are typically encountered in areas where blowing rain is a significant concern. Thermal performanceMasonry has high thermal mass, so masonry is slower to heat up, and can continue to release heat long into the night; without insulation half of that heat will be released into the building. Masonry with a dark external surface absorbs more heat than with a lighter external surface, especially if exposed to sunlight. Reverse masonry veneer walls have the brickwork inside and the lightweight frame and cladding outside; this has the advantage of providing the thermal mass on the inside of a building. Masonry itself provides very little insulation, however • A masonry veneer construction using one or more reflective foil surfaces next to a sufficiently thick cavity of still air can provide substantial insulation • Insulating material inserted between the framework studs can also provide substantial insulation. Different configurations of such foil(s), air-space(s), and/or insulating material(s) can perform significantly better at excluding heat during summer and/or retaining heat during winter; these configurations often perform in counter-intuitive ways. Because of the enormous long-term potential for reducing energy requirements and improving occupant comfort, building designers should consult engineers or adopt configurations with known performances. |
Date | |
Source | https://www.flickr.com/photos/elsie/4630275350/ |
Author | Les Chatfield |
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This image was originally posted to Flickr by Elsie esq. at https://flickr.com/photos/61132483@N00/4630275350. It was reviewed on 1 August 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
1 August 2016
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current | 17:04, 1 August 2016 | ![]() | 2,311 × 1,724 (1.14 MB) | Lindadnathan (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | NIKON |
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Camera model | E5200 |
Exposure time | 10/4,561 sec (0.0021925016443762) |
F-number | f/2.8 |
ISO speed rating | 64 |
Date and time of data generation | 13:28, 22 May 2010 |
Lens focal length | 7.8 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Microsoft Windows Live Photo Gallery14.0.8081.709 |
File change date and time | 22:06, 22 May 2010 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 13:28, 22 May 2010 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 38 mm |
Scene capture type | Standard |
Scene control | Low gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Unique image ID | C7F4FAE619574255924119A44EC5F576 |