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<br />c <br /> <br />c <br /> <br />c. <br /> <br />Cross Construction Services, Inc. <br />@ 2011 DEMOLITION SAFETY PLAN <br />CROSS CONSTRUCTION SERVICES, INC. <br /> <br />4. Lookouts will be posted on the site and warning signals will be arranged. The public and <br />other workers at the job site will be kept well back from the fall area. <br /> <br />5. The use of explosives is one way of setting off deliberate collapse. Only qualified persons <br />will complete this type of demolition. <br /> <br />6. The entire work area will be cleared of nonessential personnel before any explosives are <br />placed. <br /> <br />7. Though the use of explosives is a convenient method of bringing down a chimney or stack, <br />there is a considerable amount of vibration produced, and caution will be taken if there <br />is any likelihood of damage. <br /> <br />16. DEMOLITION PRESTRESSED CONCRETE STRUCTURES <br /> <br />1. The different forms of construction used in a number of more or less conventional structures <br />built during the last few decades will give rise to a variety of problems when the time <br />comes for them to be demolished. <br /> <br />2. Pre-stressed concrete structures fall in this general category. The most important aspect of <br />demolishing a pre-stressed concrete structure takes place during the engineering <br />survey. <br /> <br />3. During the survey, a qualified person will determine if the structure to be demolished <br />contains any pre-stressed members. <br /> <br />4. It is the responsibility of Cross Construction Services, Inc. to inform all workers on the <br />demolition job site of the presence of pre-stressed concrete members within the <br />structure. <br /> <br />5. Cross Construction Services, Inc. will also instruct them in the safe work practice that will be <br />followed to safely perform the demolition. <br /> <br />6. Workers will be informed of the hazards of deviating from the prescribed procedures and the <br />importance of following their supervisor's instruction. <br /> <br />17. CATEGORIES OF PRE-STRESSED CONSTRUCTION <br /> <br />There are four main categories of pre-stressed members. The category or categories will be <br />determined before attempting demolition, bearing in mind that any pre-stressed structure will <br />contain elements of more than one category. <br /> <br />1. Category 1- Members are pre-stressed before the application of the superimposed loads, <br />and all cables or tendons are fully bonded in the concrete or grouted within ducts. <br /> <br />16 <br />