TBuild Construction & Supplies

23/02/2026

Project completed
1-storey commercial building
Poblacion banga,so.cot.
Thanks to maam kimmy Ayn
for trusting our expertise!

24/01/2026

21/01/2026

grind grind grind😎

11/01/2026

a technical infographic titled "Construction of a Single-Pitch Roof with Standard Slope." It provides a step-by-step visual guide for building a simple wooden utility structure, such as a shed or a gazebo, using a lean-to roof design.
The guide is divided into four primary stages, showing the progression from the skeletal frame to the finished structure.

1. THE SUPPORT FRAME (TOP IMAGE)
The first stage illustrates the vertical posts and the primary horizontal supports.
• Post Heights: The diagram indicates a height difference between the front and back posts to create the slope. The taller posts are marked at 2700 mm, while the shorter ones are 2500 mm.
• Rafter Boards: Instructions specify installing 150x50 mm rafter boards on one side of the posts.
• Leveling: A note indicates the importance of checking the "Level" across the top horizontal supports to ensure the structure is square.

2. ADDING THE RAFTERS AND BRACING (SECOND IMAGE)
This stage focuses on the structural integrity of the roof.
• Paired Rafters: The image shows rafters installed across the span, noting the use of "Paired rafters" for additional strength.
• Support Braces: A specific instruction advises to "Add braces for a span of more than 2 m" to prevent sagging or structural failure under weight (like snow or wind).
• Slope: The "Expert Commentary" at the top notes that a slope of 9–25 degrees is ideal for materials like corrugated sheeting or metal tiles.

3. LATHING AND JOINERY DETAILS (THIRD IMAGE)
This section details the preparation for the final roofing material.
• Lathing: The horizontal slats (lathing) are made of 40x50 mm or 50x50 mm bars, installed with a 450 mm step (spacing) between them.
• The Notch Detail: A circular inset shows a close-up of the "birdsmouth" notch. This is a cutout in the rafter where it meets the support beam, allowing the rafter to sit flat and be securely fastened. It includes a note about "Measuring the depth of the notch."
• THE FINISHED STRUCTURE (BOTTOM IMAGE)
The final image shows the completed building.
• Roofing Material: The roof is covered with Ondulin (a lightweight corrugated bituminous roofing sheet).
• Finishing Touches: The structure is shown with decorative wooden railings and a finished floor, transforming the frame into a functional outdoor space.

08/01/2026

a technical reference chart illustrating 14 different types of structural roof trusses and girders. It provides a visual guide for engineering and architectural purposes, detailing specific geometries, typical spans (), and slope angles ().
The chart is organized into a grid of two columns, with each figure labeled at the bottom.

LEFT COLUMN: TRIANGULAR AND ARCHED VARIATIONS
This column focuses primarily on trusses that form a peaked roofline.
• Fig. 1 Triangular truss: A standard pitched truss for spans of 14–20 meters. It shows a typical slope () of to .
• Fig. 2 Polonko type triangular truss: Designed for larger spans (20–30 meters), featuring a more complex internal web pattern.
• Fig. 3 Polonko truss with raised tie beam: The bottom chord (tie beam) is curved or angled upward, allowing for more interior clearance (headroom) beneath the truss.
• Fig. 4 Polygonal truss with raised lower chord: Similar to Fig. 3, but the top chord follows a polygonal (faceted) path rather than a single simple peak.
• Fig. 5 Arched truss: Features a curved top chord and a raised, faceted lower chord, often used for aesthetic reasons or specific aerodynamic requirements in large halls.
• Fig. T Truss without diagonals: A Vierendeel-style truss that relies on rigid joints rather than diagonal bracing, often used when clear passage through the truss is needed.

RIGHT COLUMN: TRAPEZOIDAL, MONO-PITCH, AND FLAT VARIATIONS
This column covers trusses designed for flatter roofs or specific industrial applications.
• Fig. 9 Truss with broken lower chord: A pitched roof truss where the bottom chord is not a single straight line, allowing for a higher central ceiling.
• Fig. 10 Polonko truss with broken lower chord: A heavy-duty version of Fig. 9 for spans of 20–28 meters.
• Fig. 11 Trapezoidal truss: Features a flat top section and sloped sides, creating a trapezoidal silhouette.
• Fig. 12 Trapezoidal truss with suspended ceiling: Designed with a perfectly flat lower chord specifically to support horizontal ceiling structures.
• Fig. 13 Mono-pitch truss: A "half-truss" design where the roof slopes in only one direction. This is common for sheds or building extensions.
• Fig. 14 Rigid girder with tie beam: A shallow truss design where the lower chord is suspended slightly, often used for industrial flooring or very low-profile roofs.

KEY TECHNICAL ANNOTATIONS
Throughout the diagram, you will see several recurring engineering notations:
• : Represents the total Span (the horizontal distance between the two supporting walls/columns).
• : Indicates the Pitch Angle or slope of the roof.
• Det. (Detail): Circles labeled "Det. 1", "Det. 3", etc., point to specific connection joints that would require detailed engineering drawings for fabrication.
• Ratios (e.g., ): These indicate the Depth-to-Span ratio, helping designers determine how tall the truss needs to be based on its length.
*Note: This information is for educational purposes. Structural designs should always be verified by a licensed professional engineer to ensure safety and compliance with local building codes.

22/12/2025

22/12/2025

Complete sets of plans
requirements for building permit and occupancy permit for business permit purposes?
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12/12/2025

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12/12/2025

12/12/2025

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16/06/2025

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