05 Buildings, Roofs & Facades
Visible structure demands exact geometry.
JOTAIN can support tension, anchorage, and connection-component material routes for buildings, long-span roofs, and facades when the purchaser defines load path, geometry, adjustment, finish, inspection, and erection interfaces.
Component catalogue / 01
Where we can enter the supply route
Start with the component, then define the material condition, processing boundary, inspection plan, and documentary release.
Architectural tension rods
High-strength rod material and processed ends for purchaser-designed visible structures.
- Heat-treated bar
- Thread or end preparation
- Finish protection
Anchor and hold-down rods
Bar and prepared threaded material for drawing-defined building anchorage.
- Specified bar
- Cut length
- Marking and packing
Forks, spades, and couplers
Machined connection components matched to approved rod and pin geometry.
- Machining
- Dimensional inspection
- Finish when specified
Turnbuckles and fastener bar
Adjustment components and material routes for purchaser-specified connections.
- Material route
- Thread compatibility
- Assembly checks
Engineering conditions / 02
Define the service before the grade
The candidate route becomes meaningful only after load, environment, geometry, interfaces, and acceptance criteria are controlled.
Geometry
Visible rods depend on alignment and connection detail.
- Load path and eccentricity
- Fork and pin geometry
- Thread engagement
Adjustment and erection
Tolerance and adjustment must match the erection sequence.
- Finished length tolerance
- Adjustment range
- Transport and site assembly
Finish and durability
The visual finish is also a protection and handling requirement.
- Corrosion category
- Visible finish acceptance
- Fire-design and replacement interface
Material route / 03
Material selection boundary
Candidate bar and component routes are reviewed against strength, connection geometry, adjustment, finish, and the structural designer's approved specification.
| Grade | Condition | Why it enters review | Application guardrail |
|---|---|---|---|
| 42CrMo4 / 4140 | QT or thread-ready | Candidate high-strength route for tension and connection components. | Structural capacity and connection design remain purchaser responsibilities. |
| 35CrMo | QT or fastener route | Candidate route for threaded and adjustment components. | Final assembly properties depend on the complete drawing and process route. |
| 40Cr | Heat-treated or machined blank | Candidate route for general connection components. | Use depends on target properties, geometry, and exposure. |
Processing sequence / 04
A route that can be inspected
- 01Approved bar route
- 02Heat treatment
- 03Straightening and preparation
- 04Thread and end machining
- 05Finish when specified
- 06Final geometry and protected packing
Verification / 05
Evidence travels with the route
Define test location, acceptance criteria, inspection timing, marking, and release records before production.
Material
- Heat identity
- Mechanical properties
- Delivery condition
Connection geometry
- Finished length
- Thread engagement
- Fork, pin, and coupler dimensions
Visible finish
- Surface acceptance
- Coating or plating checks
- Protection during packing
Standards context / 06
Reference the rule set—do not imply approval
The purchaser's approved drawing, project specification, inspection and test plan, and contractual standard editions control the order.
RCSC high-strength bolted joints
Structural-joint design, installation, and inspection context when applicable.
Open reference ↗ISO 12944-8
Protective-paint specification context for relevant building exposure and durability requirements.
Open reference ↗Technical enquiry / 07
Send an enquiry engineering can review.
Include these inputs to reduce assumptions, shorten technical clarification, and keep the proposed route inside the purchaser's design boundary.
- 01Structure and component type
- 02Structural drawing and specification
- 03Design force and connection geometry
- 04Grade or approved material
- 05Rod diameter and finished length
- 06Thread and adjustment details
- 07Delivery condition
- 08Finish and corrosion category
- 09Inspection and documents
- 10Quantity and destination