A flat roof is essentially a low-pitched roof and is defined as a pitched roof of ten degrees or less to the horizontal. Ordinarily the angle of pitch is governed by the type of finish, which is applied to the roof. A key aspect of Jamaica homes for sale.
The function of the flat roof is to:
Residential Home
a) prevent the entry of rain and dust, particularly at joints and junctions
b) Resist the ensue of wind (both pressure and suction), sunlight and solar intensity
c) Meet the requirements of current construction regulations on structural stability, fire precautions, thermal insulation, condensation, vapor insulation, and loads, dead and imposed, according to whether roof access is permitted or not.
d) supply a suitable wearing surface
e) Permit movement due to stress and natural causes
Flat roof construction in timber
The construction of a timber flat roof involves the use of timber joists thirty-eight millimeters to fifty millimeters and from seventy-five to two hundred millimeters deep is settled on edge from four hundred millimeters to six hundred millimeters apart with the ends of the joist built into or against block walls and partitions. The depth of the joist must be enough to enable it to span the rooms below without sagging, while the width will usually be fifty millimeters which will allow ample space for fixing boarding.
It should be noted that the power of the timber joist is not in its width but in its depth, therefore, it is significant to growth the depth to growth the strength.
The flat roof must be provided with a fall to remove the rainwater as speedily as possible. The direction of the fall will be considered by the position of the roof in relation to other buildings or by its size or shape.
To derive the fall firring pieces are fixed to the top of the roof joists and upon which the roof boarding is nailed.
Firring pieces consist of whether tapered lengths of wood nailed to the top of each joist or varying depth lengths of wood nailed across the joists. Tapered firring is used for roofs covered with chipboard and the varying depth firring for boards laid parallel to the slope of the roof so that variations in the level of the boards do not impede the flow of rainwater down the shallow slope.
Flat roof in concrete
Reinforced concrete flat roofs are constructed in the same way as reinforced concrete floors - both in-situ and precast.
Roof Trusses
Trusses are structurally designed frames based on the system of triangulation. They consist basically of upper and lower chords, tension and compression webs and devices used to fasten the members together.
Trusses are designed to carry roof loads and send them to the nearing wall on which they rest. Triangulation of the truss will vary according to span. It is significant that the members of a roof truss are rigidly related together since light sections are Ordinarily used.
Advantages of Roof Trusses
1. Roof trusses save materials and on site labor costs.
2. Roof trusses can also eliminate interior bearing partitions because trusses are self-supporting.
3. Trusses can be erected speedily and therefore the buildings can be enclosed in a short time.
4. Root trusses come in a wide variety of shapes to solve nearly any problem.
5. Trusses are usually designed to span from one face wall to the other with lengths of six to nine meters or more.
Factors influencing the option of roof types
o Size and shape of building
o Span
o Appearance
o Initial cost
o Ease with which services can be accommodated in the roof space
o Weather proofing
o Maintenance cost
o Speed of erection
Constructing Flat Roof and Roof Trusses For Residential Homes
No comments:
Post a Comment