CURTAIN WALL

What is Samco Curtain Wall system?
Samco LTD. curtain wall system is a lightweight exterior cladding which is hung on the building structure , usually from floor to floor. It can provide a variety of exterior appearances but is characterized by narrowly spaced vertical and horizontal caps with glass or metal infil panels. Samco LTD. systems provide a finished exterior appearance and most often a semi-finished interior as well. They are also designed to accommodate structural deflections , control wind- driven rain and air leakage, minimize the effects of solar radiation and provide for maintenance - free long term
performance. Since Samco LTD. curtain wall systems are a good example of building science principles applied to wall design , it may be useful to review some basic principles through the details of a typical Samco LTD. curtain wall system .

Samco curtain wall system design Principles for Exterior Walls
A building enclosure may be broadly defined as a set of interconnecting elements which separate the outside from
the inside. These elements would include exterior walls, a roof, other components such as windows and doors, and
sometimes exposed floors. The function of a building enclosure is to control the penetration of snow, wind, rain and
sun to the inside and to contain the desired indoor climate. The enclosure must meet many individual requirements
but for the purpose of this paper they are limited to the following six:

 
1 - control of air flow .
2 - control of heat flow .
3 - control over the entry of rain and snow .
4 - control of sunlight and other forms of radiant energy .
5 - control of water vapour diffusion .
6 - accommodation of building movements .
   

The requirement for air tightness and consequently air leakage control is met by Samco LTD. curtain wall systems
because the air barrier of the wall is inherent in the structural properties of glass and aluminum or steel tubes that
comprise the system. The continuity of the air barrier (Figure 1) is achieved by the continuity of the glass panel through the air seal at the shoulder flanges of the tubular mullion , and through the aluminum section to the other flange surface.

The air seal between the lower shoulder flange of Samco LTD. curtain wall mullion and the metal pan of the spandrel panel provides continuity of air tightness to the air barrier metal pan and on to the next mullion connection. Such assemblies are regularly tested using air pressure to determine the structural properties of the glass , metal , and seals
and to determine the equivalent leakage area ( ELA ) that remains.

   
Samco curtain wall thermal Insulation (Control of heat flow)
Samco LTD . curtain wall systems control of heat flow is generally achieved through the use of insulation . Although it isnot apparent from the exterior, the curtain wall system uses considerable insulation usually behind spandrel glass or anyopaque panels. Because of the materials used in the structure, i.e., glass and metal, which are highly conductive, SamcoLTD. system must also contend with potential condensation on the interior surfaces . To curtail this effect, Samco LTD.curtain wall systems incorporate two distinct features : first , a sealed double glazed window or an insulated metal panand second , a thermally broken mullion , usually with a PVC plastic insert and more recently , a foamed - in - place polyurethane connection.A sealed double glazed window unit can accommodate an indoor humidity up to about 35% at an outdoor temperature of - 25 ° C with little condensation appearing on the glass . Similarly, Samco LTD . thermal break an outdoor temperature of - 25 ° C with little condensation appearing on the glass .
 
Similarly, Samco LTD . thermal break system in the aluminum or steel mullion ensures that the surface temperature of the structural mullion will remain well above the dew point temperature of the air for most building types, except for high humidity indoor environments such asin swimming pools or computer centers . Samco LTD . thermal break system also ensures that the structural mullion is thermally stable , that is , not subject to extremes of expansion and contraction.

The "Rain Screen" Principle(Control of rain and drain water)

Samco LTD. Studies of the rain penetration problem have revealed a better solution than the façade sealing approach . If the air that leaks in and through cracks and crevices of a façade during a rain storm were limited or stopped,most of the water impinging on the façade would migrate straight down the surface and little would penetrate the wall. This is the essence of the " Rain Screen " principle . If an airtight element is positioned behind a façade, the cavity formed between the exterior cladding and the airtight element may reach the same air pressure level as is exerted on the cladding surface , thus removing the force which causes air to flow through any façade opening. The " Rain Screen Wall " is therefore characterized by a cavity behind the exterior surface that is connected to the exterior but sealed tightly, or as tightly as reasonably possible, to the interior. The inner surface of the chamber is usually referred to as the air barrier of the wall.

 
 
 
 
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