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P R E P AR E D B Y : J O S H I M A V . M .
ARCH205 BUILDING CONSTRUCTION
WALL SYSTEMS- GLASS, ADOBE & STEEL
GLASS BLOCK MASONRY
GLASS BLOCK MASONRY
• Glass block is a translucent, hollow block of glass with clear, textured, or patterned faces, made by fusing two halves together with a partial vacuum inside.
• Glass block may be used in nonloadbearing exterior and interior walls, and in conventionally framed window openings.
• The glass block units are laid in Type S or Type N mortar with joints at least 6mm – 10mm thick.
• Glass block masonry typically rest on a concrete or masonry sill and provided with expansion joints to allow for movement and settling.
ADOBE & RAMMED EARTH WALL
• Adobe and rammed-earth construction both use
unfired, stabilized earth as the primary building material.
ADOBE WALL
• Adobe and rammed-earth remain low-cost
alternative building systems.
• Adobe is sun-dried clay masonry, traditionally used in countries with little rainfall.
• Adobe brick is typically made near the point of use
with soil obtained from the site.
• The dimensions of adobe brick vary according to locale, but a common size is 255 x 355 x (51 to 100)
thick.
RAMMED EARTH WALL
• Rammed earth is another traditional
building material.
• It is a stiff mixture of clay, silt, sand, and water that is compressed and dried within
formwork as a wall construction.
• Minimum Wall Thickness:
• 205mm for interior nonbearing walls
• 305mm for one-story bearing walls up to 3.66m high
• 455mm for the first story of two-story bearing walls up to 6.705m high and 305mm for the second.
• Compacting tool
• Slip forms
• Damp soil mixture is
compacted in layers not higher than
150mm.
STRUCTURAL STEEL FRAMING
• Conventional steel-framed structures are constructed of: • hot-rolled beams and columns,
• open-web joists, and metal decking
• Since structural steel is difficult to work on site, it is normally cut, shaped, and drilled in a fabrication shop according to design specifications; this can result in relatively fast, precise construction.
STEEL SECTIONS
• The most frequently used section for columns is the wide-flange (W) shape. • It is suitable for connections to beams in two directions, and all of its surfaces
are accessible for making bolted or welded connections.
• Other steel shapes used for columns are round pipes and square or rectangular tubing.
• Column sections may also be fabricated from a number of shapes or plates to fit the desired end-use of a column.
CURTAIN WALLS ON
STEEL FRAMES
CURTAIN WALLS ON STEEL FRAMES
• A curtain wall is an exterior wall supported wholly by the steel or concrete structural frame of a building.
• Curtain walls carry no loads other than its own weight and wind loads.
• A curtain wall may consist of metal framing holding either vision glass, opaque spandrel units, thin veneer panels of concrete, stone, masonry, or metal.
CURTAIN WALLS ON STEEL FRAMES
• There are three basic relationships that may be established between a structural steel frame and the curtain wall or cladding it supports. • Column in front of the wall plane
• Column within the wall plane
• Column behind the wall plane
GLAZED CURTAIN WALL- STICK SYSTEM
• The stick system consists of tubular metal mullions
and rails - assembled piece by piece on site - to frame vision glass and spandrel units.
GLAZED CURTAIN WALL- UNIT SYSTEM
• Unit systems consist of preassembled, framed wall
units - which may be pre-glazed or glazed after installation.
GLAZED CURTAIN WALL- UNIT & MULLION SYSTEM
• In the unit-and-mullion system, one- or two-story-
high mullions are installed first,- then preassembled wall units are lowered into place behind the
mullions.
GLAZED CURTAIN WALL- COLUMN COVER & SPANDREL SYSTEM
• Column-cover-and-spandrel systems consist of
vision glass assemblies and spandrel units- supported by spandrel beams between exterior
columns- columns are clad with cover sections.