Heavy Lift Sliding Door

LEASKY heavy lift sliding door is a door system that combines heavy-duty sliding function with a lift-and-lower closing mechanism. The design allows the door leaf to adjust the position of the pulley set through handle rotation. In normal condition, the door leaf slides for daily operation. When the handle is turned to the closed position, the door leaf lowers as a whole, pressing the sealing strips against the track to form a closed barrier. This product is suitable for scenarios that require load-bearing capacity and sealing performance, including large openings, building balconies, commercial building entrances, and similar applications.

 

Profile Material and Surface Treatment

The door system uses 6063-T5 high-precision aluminum alloy profiles. The main profile wall thickness meets national standard requirements. The surface treatment uses metal powder spray coating. Coating adhesion meets the requirements of GB/T 5237 standard, providing weatherability and fade resistance. The frame width is 140mm, which is designed to improve overall structural bending resistance and stability.

 

Load Capacity and Operating System

Single door leaf load capacity is available in two configurations:

Standard configuration: 300kg per leaf.

Reinforced configuration: 500kg per leaf, with single leaf dimensions up to 3.5m (width) × 3.2m (height).

 

The pulley set uses a double-bearing structure, paired with stainless steel high-low tracks. The track surface is hardened for wear resistance to meet the requirements of repeated sliding operations. The pulley and anti-sway wheel form a double-layer positioning structure, which is used to control lateral movement of the door leaf during operation.

 

Sealing System Structure

Six sealing strips are provided between the door frame and the door leaf. The strip material is EPDM (ethylene propylene diene monomer) rubber. Its compression set rate and aging resistance meet the requirements of GB/T 24498 standard. Nylon hook-edge profiles and double-layer composite strips are used in combination to form a multi-cavity thermal barrier, which is used to reduce heat transfer. When the door leaf is closed, the sealing strips press against the frame to form a compressed overlapping state. This structure also provides a certain level of pry resistance.

 

Drainage and Waterproofing Design

Drainage holes are arranged along the length of the track, combined with a continuous double-layer filter cover. The filter cover is used to intercept particles and prevent blockage of the drainage holes. The drainage path uses a height-difference design, using gravity to direct water outward. The double-layer filter cover structure is also used to reduce air backflow from the exterior side.

 

Corner Connection Method

Frame connections use glue-injected corner keys, reinforced with flattening plates. The corner keys are secured with structural adhesive to fill connection gaps, which is used to maintain long-term frame connection strength and surface flatness.

 

Application Scenarios

Buildings in coastal areas, where wind pressure resistance and salt spray corrosion resistance are factors to consider.

Typhoon-prone regions, where projects have specific requirements for wind pressure resistance of doors and windows.

Large-span living rooms, balconies, or commercial spaces, where a wider visual opening is required.

 

Product Specifications

Item	Specification
Profile Material	6063-T5 Aluminum Alloy
Main Frame Width	140mm
Surface Finish	Metal Powder Spray Coating
Max. Single Leaf Load (Standard)	300kg
Max. Single Leaf Load (Reinforced)	500kg
Max. Single Leaf Size (Reinforced)	3.5m (W) × 3.2m (H)
Sealing Strip Material	EPDM Rubber
Number of Seals	6
Track Type	Stainless Steel High-Low Track
Drainage Structure	Continuous Drainage Holes + Double-Layer Filter Cover for Backflow Prevention

 

Customization Services

LEASKY provides customized system door, window, curtain wall, and sunshade product solutions based on different regional climate conditions, building environments, and usage requirements. The customization process includes: needs assessment → on-site measurement → design proposal → drawing confirmation → production and delivery. Specific customization details (dimensions, color, configuration) need to be confirmed with the technical team.

 

Request Product Information or Quote

To obtain detailed product drawings, test reports, or project quotations, please contact the sales department with the following information:

Project name and location

Opening dimensions and required opening configuration

Wind pressure resistance, watertightness, and air permeability grade requirements (if specified)

A technical proposal and reference price will be provided within 24 hours.