Stronghold ICF - FX Series

Designed to Build Straight, Trouble-Free Walls

The Stronghold ICF FX (Fixed Web) Series blocks are the standard choice for the Insulated Concrete Form industry. The FX Series ICF Blocks uses fixed webs that provide a solid block and a solid wall for installation. The .25” thick outer fastening flanges are 1.5" wide and 16" tall for continuous fastening. Two horizontal center ties with tall rebar holders provide for secure rebar placement with bars up to a #8 or 25mm. The foam panels are 1.5 lb density, 2.75" thick, and 16" tall x 48" long. They are available in 6" & 8" sizes.

FX-Series Straight Block

Straight blocks, sometimes referred to as standard blocks, make up between 75%-85% of a typical ICF project.

stronghold icf fx straight block
Core Width Form Width Form Length Form Height Surface Area Concrete Volume
6" (152mm) 11.5" (292mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.099 yd³ (0.076 m³)
8" (203mm) 13.5" (343mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.132 yd³ (0.101 m³)

FX-Series 90° Corner Block

90° Corner blocks make up between 10%-20% of a typical ICF project.

stronghold icf corner block
Core Width Form Width Form Height Exterior Long Leg Length Exterior Short Leg Length Exterior Surface Area Interior Long Leg Length Interior Short Leg Length Interior Surface Area Concrete Volume
6" (152mm) 11.5" (292mm) 16" (406mm) 40" (1016mm) 24" (610mm) 7.11sf (0.66 m²) 28.5" (724mm) 12.5" (317.5mm) 4.56sf (0.42 m²) 0.11 yd³ (~0.084 m³)
8" (203mm) 13.5" (343mm) 16" (406mm) 42" (1067mm) 26" (660mm) 7.56sf (0.70 m²) 28.5" (724mm) 12.5" (317.5mm) 4.56sf (0.42 m²) 0.15 yd³ (~0.114 m³)

FX-Series 45° Corner Block

45° Corner Blocks are a welcome addition to the job-site, making the contractors job much easier.

stronghold icf 45 fx block
Core Width Form Width Long Leg Length Short Leg Length Form Height Surface Area Concrete Volume
6" (152mm) 11.5" (292mm) 26" (660mm) 18" (457mm) 16" (406mm) 4.89sf (4543 cm²) 0.089cy (0.0025 m³)
8" (203mm) 13.5" (343mm) 26" (660mm) 18" (457mm) 16" (406mm) 4.89sf (4543 cm²) 0.113cy (0.087 m³)

FX-Series Taper Top - Flat Top Block

The FX Taper Top - Flat Top Block is used at the top of walls when additional bearing surface is needed. The smooth Flat Top Panel provides an easy surface to screed the concrete flat on the top of the wall. Taper Top blocks can typically make up about 10% of a project.

stronghold icf fx taper top flat top
Core Width Form Width Form Length Form Height Surface Area Concrete Volume
6" (152mm) 11.5" (292mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.099yd³ (0.076 m³)
8" (203mm) 13.5" (343mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.132yd³ (0.101 m³)

FX-Series Taper Top - Lock Top Block

The Taper/Lock Top Block is often used at transition points in walls, such as when a bearing ledge is needed yet the wall will continue with additional courses higher.

ICF Blocks & Insulation Products - FX Taper-Top Lock  Top Block from Stronghold ICF
Core Width Form Width Form Length Form Height Surface Area Concrete Volume
6" (152mm) 11.5" (292mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.099yd³ (0.076 m³)
8" (203mm) 13.5" (343mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.132yd³ (0.101 m³)

FX-Series Double Taper Top Block

The Double Taper Top Block is used as the top course of walls, when a bearing ledge is needed for both sides of the wall, such as a brick-ledge on one side and floor system on the other side.

Stronghold ICF FX Double TaperTop Block
Core Width Form Width Form Length Form Height Surface Area Concrete Volume
6" (152mm) 11.5" (292mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.099yd³ (0.076 m³)
8" (203mm) 13.5" (343mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.132yd³ (0.101 m³)

FX-Series Double Flat Top Block

The Double Flat Top Block is used as the top course of walls, when a maximum amount of insulation is desired, but still wanting a smooth screeding surface for levelling the top of the wall once the concrete is poured.

stronghold icf fx double flat top block
Core Width Form Width Form Length Form Height Surface Area Concrete Volume
6" (152mm) 11.5" (292mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.099yd³ (0.076 m³)
8" (203mm) 13.5" (343mm) 48" (1219mm) 16" (406mm) 5.33sf (929 cm²) 0.132yd³ (0.101 m³)

FX-Series T-Block

T-Blocks provide a super strong wall connection in what is often thought of as a weak and difficult area to set up and pour.

Stronghold ICF TBlock
Core Width Form Width Form Length Form Height Surface Area Concrete Volume Adjacent Panel Lengths Length of T-Walls
6" (152mm) 11.5" (292mm) 44.5" (1130.3mm) 16" (406mm) 5.86sf (.544 m²) .110yd³ (.084 m³) 20.5" and 12.5" 4.5" and 12.5"
8" (203mm) 13.5" (343mm) 46.5" (1181.1mm) 16" (406mm) 6.11sf (.568m²) .161 yd³ (.124m³) 20.5" and 12.5" 4.5" and 12.5"

FX-Series Height Adjusters

The 4" Height Adjuster panels can be used in any part of the wall assembly to gain an additional 4" in height.

Stronghold ICF 4in height adjuster block
Panel Length Panel Thickness Panel Height Surface Area
48" (1219mm) 2.75" (70mm) 4" (102mm) 1.33sf (1239cm²)

End Caps

Stronghold ICF End Caps have full height fastening webs for easier connection to wood framing and attachment of finishes.

stronghold icf end cap
Core Width End Cap Thickness End Cap Height Surface Area
6" (152mm) 2.75" (70mm) 16" (406mm) 0.67sf (6187cm²)
8" (203mm) 2.75" (70mm) 16" (406mm) 0.89sf (8250cm²)

Ready to Start Your Next Project

Whether you're planning a new home, commercial build, or foundation, we’ll provide personalized pricing based on your project details and location. Fill out the form below, and a member of our team will contact you with a customized estimate.

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