Coastal areas which have a high probability of being subject to wave heights in

Coastal areas which have a high probability of being

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Coastal areas which have a high probability of being subject to wave heights in excess of 900 mm or subject to high velocity wave action or wave induced erosion shall be considered coastal high hazard areas. Figure 4-13 shows areas in Tobago which have been subjected to wave induced erosion caused intense weather or hurricane activity in the past. 4.1.3.3 Recommended construction practice Buildings and structures in flood prone areas shall have their lowest floors elevated above the expected flood level. Buildings and structures in coastal high hazard areas shall be elevated so that the lowest portions of all structural members supporting the lowest floor, with the exception of mat or raft foundations, piling, pile caps, columns, grade beams and bracing, are located at or above the expected flood level. Enclosed areas that are below the expected flood level shall: a) be used solely for parking of vehicles, building access, or storage, and b) be provided with a minimum of two openings on different sides of the enclosed areas. 4.1.3.4 Services and equipment The following s ervices and equipment shall be located above the expected flood level: a) ventilating, air conditioning, electrical and other service equipment; b) electrical wiring and outlets, switches, junction boxes and panels; and c) ducting and related installations. Water supply systems shall be designed to minimize the infiltration of flood waters into the systems. An appropriate sanitary sewage system shall be used in flood prone areas. Systems shall be designed to minimize the infiltration of floodwaters into the systems and discharges from such systems into floodwaters.
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PCTTS 599: 20XX 15 Figure 4-1 Desirable and undesirable building shapes (in plan) (a) Elongated and irregular shapes (undesirable) (b) Separation into blocks (improved arrangement) (c) Preferred shapes (desirable)
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PCTTS 599: 20XX 16 Figure 4-2 Acceptable and unacceptable arrangements of wall openings 400 min 1 800mm min to accommodate shear panel (a) Unacceptable location and spacing of openings Too narrow Too narrow Not enought shear panel 400 min (b) Acceptable arrangement of openings
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PCTTS 599: 20XX 17 Figure 4-3 Recommended vertical separation between wall openings in a two storey building Ground level First floor 600mm minimum First floor Ground level 600 mm minimum
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PCTTS 599: 20XX 18 Figure 4-4 Typical blockwork construction - gable wall to roof underside reinforced concrete ring beam floor level roof level width of wall 100mm min Section through concrete capping Concrete capping
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PCTTS 599: 20XX 19 Figure 4-5 Recommended method of construction on sloping sites Roof level Reinforced concrete ring beam Floor level 200mm thk. r.c. blockwall r.c. strip footing 200x300 r.c. tie beam (a) Method for slopes up to 15 degrees Existing grade 600 mm min 900 mm min 300x300 mm min r.c. column r.c. footing 200x300 r.c. tie beam existing grade r.c. strip footing 3 000mm maximum Reinforced concrete ring beam Roof level Floor level (b) Method for slopes greater than 15 degrees and less than 30 degrees
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PCTTS 599: 20XX 20 Figure 4-6
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