One of the most popular types of roof truss materials used by home building companies บริษัทรับสร้างบ้าน is cold-rolled steel. The parts and layout are the same as the frame that uses processed wood. By welding or carving the joints of parts together, similar to joining a truss.
- Cold-rolled steel rafters
- The distance between the cold rolled steel rafters is approximately 12″, 16″ or 24″ (305, 40, 610), depending on the weight of the material. roof tiles and the length of the span of the rafters
- Cold-rolled steel rafters
- Steel poles for the ceiling
- Angle bar or fixing device. Clips secure the rafters and ceiling joists to the rafters or steel beams on the walls.
- Under the bottom of the slatted steel compartment is provided for attaching battens.
- Steel rafters
- Bracket steel
- C-shaped steel forming the chicken breast.
Attic gable window porch
- tenderloin or chicken breast
- rafters head
- Double crossbar
- hip trough
- rafters
- hip trough
- Double beam rafters
- Chicken breast and rafters of the attic window porch.
- The frame on the side of the porch.
- corner pillar
- Double crossbar
- End rafters
- rafters
- The protrusion of the gable window porch. May be straight out over the wall of the building
Sloping window porch of the attic
- tenderloin or chicken breast
- The rafters of the attic roof.
- Edge beams or double edge rafters to hold the side plates.
- Sealant fixing line.
- rafters
- Pick up the floor.
- The frame of the wall under the window is placed on a steel support bar.
exterior wall
wooden rafters
The wooden roof structure in the construction of houses รับสร้างบ้าน is also important and popular in building construction. In general, sawn timber made of ases, beams and rafters can be trimmed, assembled and installed quickly and easily with conventional tools.
- Chicken breast pieces that must support rafters with a slope of the roof lower than 3: 12 must be designed to support the weight of the roof like a beam.
The length of the span of various sizes of wooden rafters is as follows:
- 2″ × 6″ can be draped over 10′ (3,050) long.
- 2″ × 8″ can be draped 14′ (4,265) long.
- 2″ × 10″ spans 16′ (4,875) long.
- 2″ × 12″ can be draped over 22′ (6,705) long.
- How long the spanning capability is approximate. because in addition to depending on the size of the rafters also depends on the distance between the rafters tile weight and type of wood
- The size of the wooden rafters may be larger than recommended. to support an increased layer of insulation and should leave space for ventilation
- Should consult a structural engineer. to know the exact size and span of the wooden rafters again
- The gable panel is attached to the overhang rafters on the gable wall and re-attached to the double rafters.
- Wind molding is a piece that covers the front of the gable that protrudes at the end.
- Making openings in the roof. Will frame the same as making an opening in the floor.
- Double crossbar
- Double rafters for large openings.
- The rafters are generally solid sawn timber. (wood for making joists) 2″ thick
- The distance between the rafters is generally about 12″, 16″ or 24″ (305, 405, 610), depending on the size and weight of the roofing material, wind load and length of the rafters.
- A wooden roof structure is a combustible structure, so this issue should be considered when building a fireproof roof. This type of roof structure should be avoided.
- roofing material
- Because the wood may be corroded. If there is moisture or in a closed or stuffy place Therefore, space should be spaced to allow air circulation.
- Able to hit the ceiling directly below the rafters. Or may be able to accept the ceiling separately
- In the case of a separate ceiling hoist, various systems or pipes may be placed on the ceiling. because there is still space left
Roof cover
Roof coverings used for rafters with large slopes. And in areas with cold weather and snowfall, it is preferable to use plywood for outdoor use. In addition to acting as a foundation layer for roofing materials, it also increases the strength of the roof structure. In areas with hot climates and no snowfall, 1″ × 4″ or 1″ × 6″ hardwood is laid out as a batten, spaced out and covered with roofing sheets or shingles.
- Drive nails at every 6″ (150) and 12″ (305) distances at the internal supports.
- Use 6d regular nails for sheets up to ½” (13) and 8d for sheets 5⁄8″ to 1″ (16 to 25).
- Cover the edges to prevent air or moisture from entering with a sheet or waterproof material. and should be of the type for external use only.
- Plywood for exterior use, edged with veneer material. or moisture proof glue
- The longitudinal planks should be placed perpendicular to the supports or rafters.
- The joints between the sheets should be grouted with moisture-proof material.
- May leave a slight gap of 16″ (3) joints, depending on recommendations from the roofing sheet manufacturer. and sealant with waterproof material
- The ceiling for sale should be a type of wood for external use.
