Home Improvement

What are the principles of structural beams on a knock-down house 

The upper beam is a supporting structure to support the weight by having a wall frame as a bracket between the lower beam and the upper beam or in the case of a deck. The upper beam will act as a beam to support the weight from the deck, transfer the weight onto the column or from the wall frame down to the lower beam to the column respectively by building a beam on a single-storey knock-down house. Or to build a single-storey house, the recommended upper beam size is 4x4 inches, 2.3 mm thick, or 3.2 mm.

Note : house building connection trendyhome.co.th  It is a conspicuous relationship in the home improvement business for a long time. We have more than 5000 houses worked in Thailand.

100x100x2.3 mm. 100x100x3.2 mm. According to the budget and usage and may be viewed from the thickness, columns and lower beams used, the upper beams should have the same thickness. Normally, the upper beam is not a problem. Beam depth and beam span because there is a frame around the wall to support the weight of beams every 60 centimeters

The formula for estimating the depth of The upper beam is equal to the length of the crossbar 15.

Two types of floor plan design principles for a single-storey knock-down house

  1. Design principles of floor joists for installation Fiber cement floor plank 25 mm. thick because fiber cement is more fragile than real wood flooring, causing us to lay steel joists more frequently, approximately 30-35 centimeters.

2 Design principles of floor joist for fiber cement board installation

Thickness 16-20 mm. The joist for the floor board is a 2-way joist, laying the joist at a distance of 40x120 cm. The face size of the joist must be wide enough for the distance of the board, which is not less than 50 mm. For example, the steel box is 150x50 mm. or 100x50 mm. . In the case of using steel 75x38 mm., the span of the slab should be placed in pairs.

Floor boards can be used as a topcoat, such as rubber tiles, laminate floors, or ceramic tiles.

Floor joist, box steel, size 4x2 inches, thickness 2.3 mm., spacing 40 x120 cm.

Principles of wall truss design For a single-storey knock-down house

1 Internal wall frame using Fiber cement board, thickness 8 mm.

Steel wall trusses that are suitable for internal and external walls will have a width that fits the door frame and the window is

3 inch C steel, 1.6 mm thick, which has a cross-section C75x45x15x1.6 mm. height not over 1.5 meters.

The spacing of the frame is approximately 60 centimeters, the joints of the internal wall panels. Use double-jointed C steel.

The distance of the frame is 60 centimeters. It is the same distance as the interior walls. and external wall

wooden case, outside the range per wooden slat There should be a double-jointed steel frame to receive the same wooden planks.

TIP. In the case of a building with a deck (wall less than 3 m.), add 2 rows of horizontal trusses at a distance of 1 part 3 of the height to be supported on the sides to help support the vertical weight well.

The frame of the wall for the window frame aluminum mirror To face the steel C body 3 inches to receive all 4 sides.

Wall frame for UPVC door frame Change to 3×3 inch or 3×1.1/2 inch steel box.

because of the C steel will have a problem in use due to the twisting of the iron from opening and closing the door

2 bathroom wall frames For fiber cement board covered with ceramic tile, the method of operation is to install the 8 mm. thickness fiber cement board with the rough side facing out for better adhesion of the adhesive mortar. Use C-section steel 3 inches, thickness 1.6 mm. C75x45x15x1.6 mm., roughly frame size 60x60 centimeters to reduce wall shake. Does not cause ceramic tiles to slip off, fiber cement board walls covered with ceramic tiles Install the 8 mm. thickness fiber cement board with the rough side facing out. To make the cement glue adhere well.

Principles of designing a ceiling frame For a single-storey knock-down house

Steel box 50x25x1.6 mm. using a ceiling krathong with a distance of 40 x 60 centimeters.

Gypsum board, 9 mm thick, gypsum board installed, smooth plastered joints, use C-line steel by using 40 cm ceiling krathongs.

2 ceiling trusses installed with slats 3 inch fiber cement

Thickness 8 mm., use steel box size 2x2 inches, thickness 1.6 mm.

Steel box 50x50x1.6 mm. The distance is 40 cm.

3 trusses installed with fiber cement board Use 3-4 inches of C-section, 1.6 mm. thick (same size as rafters), C-steel C75x45x15x1.6 mm. C-steel C100x50x20x1.6. mm. The distance of the alley is 40 cm.

principles of roof truss design For a single-storey knock-down house

1 Steel is a component of the roof structure. and take the weight from the rafters to transfer the weight to the building pillars pillar of building a house Use box steel 4x2 inches, thickness 2.3-3.2 millimeters, padding not more than 2 meters, use box steel 6x2 inches, thickness 2.3-3.2 millimeters, padding not more than 3 meters

  • Steel box 100x50x2.3mm. / 100x50x2.3 mm.
  • Steel box 150x50x2.3mm. / 150x50x3.2 mm.
  • According to the budget and usage, in some cases use steel
  • 2C100x50x3.2 mm. / 2C125x50x3.2 mm. / 2C150x50x3.2 mm.

2 Rafters are part of the roof structure. has a duty to support and transfer the weight from the purlin to the Use 3-6 inch C-section steel, 1.6-2.3 mm thick, for not showing the frame with cloth covering.

Use steel box 3-6 inches, thickness 1.6-2.3 mm. for displaying the frame, without covering and preventing bird nesting.

The distance of the rafters depends on the roof purlin, the weight of the roof material. and the length of the span over the rafters

  • C-section steel C75x45x15x1.6-2.3 mm., span not more than 2 meters.
  • C-section steel C100x50x20x1.6-2.3 mm., span not more than 3 meters.
  • C-section steel C150x50x20x1.6-2.3 mm., span not more than 4 meters.

3 roof purlins, which is to act as a supporting frame for the roof sheet The purlin is the part that the tile or roofing material is attached to.

Galvanized steel purlin 0.5-0.7 mm thick for metal sheet roof

  • The distance of the rafters is not more than 1 meter.
  • Purlin spacing 80-100 cm – standard metal sheet roof
  • Purlin distance of 50 centimeters – Spanish metal sheet roof.

Galvanized steel purlin, thickness 0.7-1.0 mm. for double corrugated tiles.

  • The distance of the rafters is not more than 1.2 meters.
  • Purlin distance 1 meter – back double corrugated tiles

C-section purlin for metal sheet roof Double corrugated roof

  • C 75x45x2.3 mm. rafter spacing not more than 2.25 meters, purlin distance 1.0 m.
  • C 100x50x2.3 mm., rafter distance not more than 3 meters, purlin distance 1.0 m.
  • C 150x50x2.3 mm., rafter distance not more than 4 meters, purlin distance 1.0 m.

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