Buildings protection

The main methods of protecting buildings from gas ingress are  

Many inban developments include basement car parks that are well venhlated to deal with exhaust gases from cars. They are often constructed with thick reinforced concrete retaining walls and cast in situ suspended floor slabs. The basement is in effect a very large and effective ventilated void that provides more than adequate protection against low levels of ground gas. Care should be taken, however, to ensure that features such as lift shafts or service risers which extend to the base of the car park are provided with adequate protection. 

For commercial developments on more highly gassing sites additional protection may be provided by using the following  

Clay capping layers may also be used as additional protection layers to minimise the risk of vertical migration. However, these are difficult to seal around foimdations that penetrate them (e.g. piles) and should not be used as a replacement for either a ventilated void below the floor slab or to replace membranes across the floor slab. 

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Low level waste with its generally smaller radioactivity level can be stored in suitable containers in buildings. Protective shielding and handling equipment are required. 

Locate any unsprinklered combustible building at least 40 feet from a combustible tower. Where unsprinklered cooling towers expose adjacent buildings, protection is needed because of the exposure. Such protection may be by sprinklers for the tower or protection for the exposed building. 

Part 13 Construction and use of rooms or buildings protected by pressurization... 

The performance properties of zinc phosphate pigments are attributed to chemical effectiveness, and the ability to form adhesion and inhibitor complexes on the surface of the substrate. In addition, in the case of zinc phosphate, electrochemical effectiveness, preferably in anodic areas, is also of note, since small amounts of the zinc phosphate will hydrolyze under moist conditions. The result of this reaction is argued to be the formation of zinc hydroxide and secondary phosphate ions, which are able to build protective layers on the metal surface in anodic areas [5.67, 5.68]. 

Figure 5.6 A newiy constructed residential building protected with elastomeric acrylic...

FACTORS THAT INFLUENCE THE DESIGN AND IMPLEMENTATION OF BUILDING PROTECTION... 

Appropriate design and implementation of building protection is determined by multiple factors, including (1) threat types (2) activities housed within the building and the mission of those activities (3) the level of protection sought (4) limitations posed by procurement type, quality of design and construction, maintenance, and wear and tear of the building and (5) availability of resources. 

The goals and objectives of building protection vary depending on the mission and activities of each building. Clear definitions of goals and objectives for... 

Recommendation 1 Clear and realistic building protection goals and objectives should be defined prior to deploying protection systems. 

Recommendation 2 Building protection systems should be designed and implemented on a case-by-case basis for each structure to be protected. 

Recommendation 3 Life-cycle costs should be planned for prior to deploying building protection systems. 

A number of components can be used in building protection and applied in different combinations to achieve different levels of protection. Components that can be designed, modified, installed, or implemented to enhance building protection include the following ... 

Recommendation 4 Because goals and objectives for protection drive the choice of building protection system for each installation, metrics for a building protection system should be based on these same well-under-stood, clear goals and objectives. 

Recommendation 5 Prior to implementation of a building protection program, the Department of Defense (DOD) should establish a complete framework for building protection that guides decision making for each building to be protected. The decision-making framework should... 

What collective principles can be derived from current building protection efforts How can information gained from a test bed facility be extrapolated to operational buildings with completely different designs ... 

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