DIY Installation Guide for Bi-Folding "Book" Gates: B400 Hardware Kit Setup
Why Choose the B400 Kit?
The B400 BI-FOLDING kit is a concealed mounting mechanism used to create premium-quality gates that typically carry a very high price tag. This kit is manufactured in Ukraine and designed for the local market, making the price highly affordable. For comparison: prices for similar kits in the European market are 3 to 5 times higher than the current price of the B400.
Operating Principle
You can manufacture folding swing gates in any design and shape. The gate can consist of 2 or 4 sections depending on the width of the driveway. When the first section (A1 and A4) is moved by hand or by an electric drive (automation), the second suspended section (A2 and A3) automatically begins to move, precisely following the position of the main bearing section.
Driveway Width and Section Calculation
Parameters for Driveway Width up to 4 Meters (2 Sections)

- Driveway width A0: from 218 cm to 402 cm
- Width of each section A1 and A2: from 108 cm to 200 cm
- Clearance between post and section A1: 1 cm
- Clearance between sections A1 and A2: 1 cm
- Frame thickness: from 4 to 6 cm
Parameters for Driveway Width up to 8 Meters (4 Sections)

- Driveway width A0: from 436 to 804 cm
- Width of each section (A1-A4): from 108 cm to 200 cm
- Required: 2 sets of B400 Hardware Kits
General Technical Specifications

- Max weight of 2 sections: up to 450 kg.
- Max weight of the suspended section A2 (A3): 230 kg.
- Frame thickness: from 4 to 6 cm.
- Installation: Adjustable support (10 cm) requires a post width of at least 100 mm.
- Material: High-strength galvanized steel.
Detailed Installation and Diagrams

Installation Scheme Analysis (Top View)

Node A (left): Mounting on the main pillar. Clearance between pillar and first section — 10 mm. Distance to "Stopper K" — 340 mm.
Node B (right): Connection between the first and second sections. Clearance — 10 mm. Edge offset — 60 mm.
• If the frame thickness is 60 mm: simply weld the hinges between sections.
• If the frame thickness is 40 or 50 mm: you MUST offset the hinges from the plane line by exactly 60 mm, as shown in the diagram.
Sections and post must be in the same plane as indicated in the scheme!
Want to Automate Your Driveway?
Order the original B400 kit and accessories at manufacturer prices.
Catalog: Bi-Folding Gates (Suspended, Swing)