ITEM

YES

NO

SKETCH
REF#

Walls

Precast concrete interconnected and fixed to floors and roofs

Coral stone block masonry

a

12 inches (or greater) in thickness and with a maximum height-to-thickness ratio of 12, or

b

6 inches (or greater) in thickness and reinforced and fixed to floors and roofs

Concrete block masonry reinforced and fixed to floors and roofs

Timber construction complying with all of the following:

a

3/4-inch marine plywood or 5/8-inch tongue-and-groove lumber

b

2-inch by 4-inch vertical studs at (maximum) 2-foot spacing to which the plywood or lumber is nailed or screwed

c

two 2-inch by 4-inch horizontal base plates and two 2-inch by 4-inch horizontal eaves beams to which the studs are fastened with galvanised metal plates in accordance with manufacturers’ specifications

#W1

d

all openings framed with 2-inch by 4-inch vertical and horizontal studs, cills and lintols all fastened with galvanised metal plates in accordance with manufacturers’ specifications

#W2

e

the entire perimeter secured to reinforced concrete foundations with galvanised metal straps at (maximum) 4-foot spacing

f

minimum depth of foundation to be 3 feet below adjacent ground level unless some other means is used to achieve adequate anchorage

#W2

Roofs

Concrete

Light-weight coverings

a

26-gauge steel sheeting with valley fasteners or with ridge fasteners supplemented by spacer blocks under the ridges. Fastener spacings must be not greater than 6 inches along the purlins and purlins must not be further apart than 4 feet for 15% of the roof dimension along eaves, gables and ridges.

#W3,
#W4

b

22-gauge aluminium sheeting with valley fasteners or with ridge fasteners supplemented by spacer blocks under the ridges. Fastener spacings must be not greater than 6 inches along the purlins and purlins must not be further apart than 4 feet for 15% of the roof dimension along eaves, gables and ridges.

#W3,
#W4

c

Asphalt shingles fixed in accordance with manufacturer’s recommendations for hurricane areas and laid on waterproofing felt on top of 3/4-inch (or greater) plywood sheets which in turn are fastened by screws or annular nails to supporting timber rafters

#W5

d

shingles individually fixed to close boarding which in turn is fastened by screws or annular nails to supporting timber rafters

#W5

NB

i

In all cases the methods of fixing must, at least, comply with the manufacturers’ recommendations for severe hurricane locations

ii

If battens are used, the fastening of the battens to the close boarding must be at least as strong as the fastening of the covering to the battens

Other coverings

a

slates individually fixed to close boarding

#W5

b

concrete or clay tiles individually fixed to close boarding

#W5

NB

i

In all cases the methods of fixing must, at least, comply with the manufacturers’ recommendations for severe hurricane locations

ii

If battens are used, the fastening of the battens to the close boarding must be at least as strong as the fastening of the covering to the battens

Frame supports for light-weight roof coverings

a

Steel rafters fixed to walls

#W6

b

Bolted steel trusses fixed to walls

#W6

c

Timber rafters fixed at the ridges and to the walls with bolts or proprietary fasteners

#W6,
#W7

d

Bolted timber trusses fixed to the walls with bolts or proprietary fasteners

d

Timber trusses fabricated using proprietary fasteners and fixed to the walls with bolts or proprietary fasteners

NB

In all cases the methods of connecting and fixing must, at least, comply with the manufacturers’ recommendations for severe hurricane locations

Windows

Made of laminated glass fixed to frames with structural silicon and able to resist, without breaching, the impact of flying objects such a 2-inch by 4-inch piece of timber weighing 9 pounds moving at 35 miles per hour (similar to the requirements of Dade, Broward and Palm Beach Counties of Florida), or

Protected by pre-installed or pre-fabricated shutters which are made of at least 3/4-inch timber or otherwise able to resist without breaching the impact of flying objects such as a 2-inch by 4-inch piece of timber weighing 9 pounds moving at 35 miles per hour.

#W8,
#W9,
#W10

Made of timber or aluminium louvres with provisions for excluding the rain during storm conditions

The windows or shutters must be secured to the walls, slabs, beams or columns near all comers of each panel or in accordance with the manufacturers’ recommendations for severe hurricane locations

Doors

Glass Sliding Doors

a

Made of laminated glass fixed to frames with structural silicon and able to resist without breaching the impact of flying objects such as an 8-foot long 2-inch by 4-inch piece of timber moving at 35 miles per hour, or

b

Protected by pre-installed or pre-fabricated shutters which are made of at least 3/4-inch timber or otherwise able to resist without breaching the impact of flying objects such as an 8-foot long 2-inch by 4-inch piece of timber moving at 35 miles per hour.

c

The moving frames must have a certificate from the supplier indicating compliance with the requirements for Category 3 hurricanes, including both strength and deflexions.

d

The fixed perimeter frames must be secured to the walls, slabs, beams or columns by bolting or in accordance with the manufacturers’ recommendations for severe hurricane locations.

e

The tracks of the top and bottom rails must be deep enough to prevent the moving doors from being dislodged in severe hurricanes. (The manufacturer’s advice should be sought.)

Roller Shutter (or Overhead) Doors

a

These must have certificates from the suppliers indicating compliance with the requirements for Category 3 hurricanes, including both strength and deflexions

b

The fixed perimeter frames must be secured to the walls, slabs, beams or columns by bolting or in accordance with the manufacturers’ recommendations for severe hurricane locations

c

The side tracks must be deep enough to prevent the moving doors from being dislodged in severe hurricanes unless some other mechanism is employed to prevent such an occurrence
(The manufacturer’s advice should be sought.)

Other Doors

a

Timber doors must be solid core or made up from solid timber members

b

Each door leaf must be fixed by hinges or bolts in at least four locations adjacent to all comers

Other Apertures

a

Protection from wind and rain must be provided by pre-installed or pre-fabricated shutters which are made of at least 3/4-inch timber or otherwise able to resist without breaching the impact of flying objects such as an 8-foot long 2-inch by 4-inch piece of timber moving at 35 miles per hour.

#W8,
#W9

b

The shutters must be secured to the walls, slabs, beams or columns near all comers of each panel or in accordance with the manufacturers’ recommendations for severe hurricane locations.

#W10

Solar Water Heaters and Air-conditioners

These must have certificates from the suppliers indicating compliance with the requirements for Category 3 hurricanes for both manufacture and installation

Roof Shapes

a

hip-roofs without parapets but with no overhangs and with minimum slope of 20°, or gable roofs without parapets but with no overhangs and with minimum slope of 25°

#W11

b

hip-roofs with parapets and with minimum slope of 15°, or gable roofs with parapets and with minimum slope of 20°

#W12