The essence of steel‑structure buildings and their envelope systems lies in factory prefabrication and on‑site assembly, with standardized components for each building element serving as the fundamental means to achieve this approach. To ensure the applicability, versatility, and reliability of OHC building envelope systems, more than twenty specialized fittings, transition pieces, and standard brackets have been developed. Through robust, ingeniously designed connections, these systems enable continuous, seamless roof panels that slide as a unit, secure side‑panel joints, and rigid waterproofing—eliminating any risk of leakage.

All standard components of Dongfang Cheng Steel Structure are manufactured using in-house molds and fixed-pressure molding. The connection bolts, self-tapping screws, and waterproof butyl sealant at each joint are rigorously verified through calculations and field testing, adhering to unified standards and standardized procedures to ensure absolute reliability.

A rigid waterproofing system for parapet tops
A roof gutter system capable of creating a slope
A rigid waterproofing system for sliding roof panels at gable ends
A sliding metal roofing waterproofing system for parapets
A monolithic rigid waterproofing system for buildings
Building Curtain Wall Connection Components and Connection Methods
A structure and installation method for an external gutter suspended from the eaves
A gable waterproofing structure
An adhesive coating machine system and an adhesive coating method
A glue‑tank device for a gluing machine and its method of use
A glue-dispensing control method and a glue-dispensing control device for a glue-applying machine
A lower-end connection structure for a double-wave daylighting strip node and its installation method
An upper-end connection structure for a dual-wave daylighting band node and its installation method
A stainless steel roofing system and its installation method
A connector for metal roofing daylighting panels

A waterproofing system for metal door and window openings

A metal canopy ridge waterproofing system

A roof gutter assembly
A rigid waterproofing assembly for parapet tops
A sliding support for metal roofing under a parapet wall
A roof sliding support bracket
Transfer connector used to connect to embedded parts installed in concrete members.
An embedded part used to connect architectural curtain walls to concrete components.
Sliding bracket at the gable end

Inward-sliding bracket
Outward-sliding bracket
New-type sliding bracket
A stable pressure source for a glue applicator
A glue-dispensing control device for a glue-applying machine
A glue bucket arrangement for a gluing machine
A glue-coating machine system
A connection structure for the lower end of a dual-wave daylighting band node.

A top-end connection structure for a double-wave daylighting band node
A stainless steel roofing system and a wall panel with concealed connections.
Building curtain wall connection components

A sliding support for low‑profile metal roofing
A type of low-standing-seam welded metal roofing
Additional purlins for the renovation of trapezoidal‑profile metal roofing
Additional purlins for the renovation of standing-seam metal roofing
A metal ridge waterproofing system and its installation method
A method for connecting a metal roof panel to a gutter, and a waterproof eave flashing.
Rail-mounted sliding bracket
A multifunctional ridge water deflector for metal roofs
A waterproof eave waterstop板
Sliding bracket for skylight strip
Parapet and gable sliding bracket
A eaves‑mounted external gutter structure
A sliding support for roof panels

1. Co-authored the national standard GB** “Technical Standard for Testing, Evaluation, and Strengthening of Building Metal Panel Envelope Systems” (not yet published);
2. Co-authored the industry standard GJG/T 453-2019, “Technical Standard for the Application of Metal‑Face Sandwich Panels” (effective June 1, 2019);
3. Co-authored the industry standard JGJ/T*** “Technical Code for Building Metal Envelope Systems” (not yet published);
4. Co-authored the national standard GB** “Test Method for Wind-Resistant Performance of Metal Roofs – Part 2: Static Pressure Method” (not yet published);
5. Co-authored the group standard T/BSSIA 0001-2018 “Technical Standard for Metal Roofing Repair Engineering” (effective October 10, 2018);

6. Co-authored the group standard T/CABEE-JH2018018, “Green Retrofit Evaluation Standard for Existing Industrial Building Envelopes” (not yet implemented);
7. Co-authored the association standard CECS*** “Technical Standard for Welded Stainless Steel Roofing Engineering” (not yet published);
8. Co-authored the association standard CECS*** “Technical Standard for Waterproofing of Metal Roofing Projects” (not yet published);
9. Participated in the renovation project of the 13th Five-Year Plan research topic “Thermal Performance Testing Apparatus for the Envelope System of Prefabricated Industrial Buildings” (which has already been accepted).
10. Participated in the compilation of “Illustrated Guide to Quality and Control of Steel Structures in Construction.”

Dongfang Cheng Steel Structure boasts extensive experience in steel‑structure construction. Through years of relentless effort and continuous innovation, we have earned the trust of numerous clients thanks to our meticulous project management, cutting-edge fabrication and installation techniques, highly skilled workforce, and unwavering reputation for quality, value, and service. As the steel‑structure industry continues to grow and evolve, we will remain committed to superior product quality, deliver attentive customer service, and work hand in hand to create a bright, mutually beneficial future.