Construction concrete, masonry

Concrete Construction Safety General Requirements Impalement Protection Impalement Protection Alternate Concrete Masonry Construction Concrete Masonry Construction... 

Typical Use Construction concrete, masonry, mineral fibre cement. 

Below-grade walls may be constructed of poured concrete, masonry blocks, or other materials such as all-weather wood or stone. This chapter discusses details for use of poured concrete and masonry foundation because these are the materials most commonly used for new construction. Recently, trade associations such as American Plywood Association (APA) and the National Forest Products Association (NFoPA) have issued publications on designing radon resistance permanent wood foundations. Information on these types of foundations can be found by contacting the appropriate trade association.21... 

NCMA, Specification for the Design and Construction of Food Bearing Concrete Masonry, National Concrete Masonry Association, Herndon, VA, 1968. 

For facilities susceptible to nitrocellulose, single base and multibase dusts, the same details could be used with the addition of alternate basic construction types. Six types of construction were chosen which included wood frame, concrete masonry units, reinforced concrete, modified preengineered buildings, fiberglass reinforced plastic and sandwich panels. These were chosen for development of architectural details similar to those mentioned above for nitroglycerin facilities except troweled-on conductive floor lining was to be used instead of lead. 

Many petrochemical structures have concrete masonry unit (CMU) walls with little or no steel reinforcement. This type of construction lacks ductility and has relativity low resistance to blast loads. 

Measures to reduce the impact of fire include active and passive systems. Active systems include automatic sprinkler, water deluge, water mist, gaseous agent, dry chemical, foam, and standpipe handle systems. Passive protection is provided by fire resistive construction, including spray-applied or cementitious fireproofing of steel, concrete/masonry construction, and water-filled steel columns. Chapter 7 provides details on the design of fire protection systems. 

Concrete masonry is simply the name given to the cement building blocks employed in the construction of many homes, and it is simply a precast block of cement, usually with lots of voids. Precast concrete is concrete that is cast and hardened before it is taken to the site of construction. Concrete sewer pipe, wall panels, beams, grinders, and spillways are all examples of precast cements. 

Concrete masonry unit (CMU) construction is widely used (Figure 6). It can prevent buildup of contaminants when finished with an epoxy or other smooth, chemical-resistant coating. Where retrofit is not a regular practice, the strength of concrete block and its long life recommend it. 

Fire walls are those walls that are designed to be either independent of the building s structural frame and major building components, or designed with sufficient stability and strength to remain standing in the event of building collapse on one or the other side of the wall. These types of walls are typically constructed of masonry or concrete materials. 

Methods of Testing. ASTM tests for various concrete masonry units are available. These consist of compressive strength and sometimes per cent moisture and rupture modulus tests at a 28-day period. Compressive tests are often made by core-sampling actual construction work during early stages. To avoid waiting, 7-day tests are made and related to 28-day tests as follows ... 

Concrete Masonry Construction — Citations—Shoring System Collapse... 

Concrete Masonry Construction — Concrete Construction Safety... 

CONCRETE MASONRY CONSTRUCTION — CONCRETE CONSTRUCTION SAFETY-1... 

J. J. KELLER S CONSTRUCTION TOOLBOX TALKS Concrete Masonry Construction — Concrete Construction Safety... 

Concrete Masonry Construction — General Requirements — Sign-Off Sheet... 

This sign-off sheet documents the employees who have taken part in a training session on Concrete Masonry Construction — General Requirements at this company, ... 

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