MCN-0027 3-1/2” Reinforced Mull Post

The MCN-027 Reinforced Mull Post is a 3-1/2" vertical structural member designed for combined door and window systems. It connects and secures adjacent units (such as fixed windows, operable windows, doors, and sidelites), providing additional structural strength to ensure stability and safety for openings. The built-in LVL (Laminated Veneer Lumber) reinforcement significantly enhances load-bearing capacity and warp resistance.

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Dimensions

Overall Height / Length: 3.504″ (89.00 mm)
Main Body Width / Face Width: 2.5″ (63.50 mm)
Flange Depth / Installation Depth: 1.496″ (38.00 mm)
Reinforcement Material: LVL (Laminated Veneer Lumber)

Note: Key profile dimensions shown above. The 3-1/2″ size is a compact specification suitable for combined door and window systems with limited space.

Key Features

Reinforced structure – Enhanced bending resistance and load capacity
LVL reinforcement core – Built-in laminated veneer lumber significantly improves structural strength and stability
3-1/2″ compact size – Suitable for combined door and window systems with space constraints
Designed for combined systems – Connects fixed windows, operable windows, doors, and sidelites
Wind load resistance – Enhanced capability to withstand wind pressure
Durable material – Resists warping and weathering; reliable for long-term use

Applications

Vertical connection between fixed and operable windows
Division post between door and sidelite
Combined door and window systems with limited space
Combined door and window projects in commercial buildings and residences
Door and window openings requiring additional reinforcement but with space constraints

Installation Tips

Ensure the top and bottom frames are level and the mull post position is plumb before installation
Secure the mull post to the top and bottom frames with appropriately sized screws
Butt adjacent window/door units tightly against the post and seal with caulk
Ensure reliable connection to the frame structure for proper load transfer
After installation, check the post for plumb and ensure smooth door/window operation

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