Modular Blocks & T‑Joist System

Reduce completion times on horizontal projects.

Modular Blocks & T‑Joist System

Reduce completion times on horizontal projects.

Jackbilt load-bearing modular blocks.

Jackbilt modular blocks speed up horizontal construction because they allow you to build houses without the need for cast-in-place columns or beams.

Typical Applications

Single detached houses
Duplexes
Townhouses

Save on forms and concrete. Save time and money.

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As fast as 7 days that’s how fast you can finish masonry work on a 30-square meter one-story single-detached house when you use Jackbilt modular blocks.

Partial grouting only on core holes with vertical reinforcement.

Less plastering needed compared to regular hollow blocks. Jackbilt blocks have a smooth surface finish.

Highly compacted with low water absorption rate.

Special Application Blocks

8-inch stretcher block.
Strengths: 700 psi to 1500 psi
Applications: basements and below ground installations; warehouses with high walls.
 

Size (inches)Length (mm)Width (mm)Height (mm)
8390190190

Lightweight stretcher block.
Strengths: 500 psi, 700 psi.
45% lighter than non-load concrete blocks. Reduces foundation costs.
 

Sizes (inches)Length (mm)Width (mm) Height (mm)
439090190
6390140190

Paving block. Strength: 8000 psi
Designed for easy installation & maintenance. Applications: heavy-duty paved areas like port yards and container yards.
 

Length (mm)Width (mm)Height (mm)
200100100
200100120
200100150

For more information about
Modular Blocks

Modular Blocks & T‑Joist Floor System

Typical Installation
Modular Block & T‑Joist System Installation

T‑JOISTS. Easy to install. No special equipment needed.

T-joists are precast, prestressed inverted T-beams that eliminate the need to install and dismantle labor-intensive plywood formworks for floor slab construction. No special equipment needed to install T-joists. They’re light enough to be carried by two workers.

T‑JOISTS. Easy to install. No special equipment needed.

T-joists are precast, prestressed inverted T-beams that eliminate the need to install and dismantle labor-intensive plywood formworks for floor slab construction. No special equipment needed to install T-joists. They’re light enough to be carried by two workers.
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T-joist.

Designed and proven to speed up floor slab construction in 2-storey structures.

Dimensions

Length (mm)Width (mm)Height (mm)
up to 5000120143

Technical Specifications

T‑Joist Cross Section
CROSS SECTIONAL PROPERTIES 
Width, mm120
Total height, mm143
Cross section net area, mm212,561
Distance top fiber to neutral axis (ytop), mm85
Distance bottom fiber to neutral axis (ybot), mm58
Moment of inertia (Ix) mm420 x 106
Self weight (kgs/lineal m)30
DESIGN CONSIDERATIONS
Minimum bearing requirement - concrete beam, mm100
Minimum bearing requirement - steel beam, mm75
Superimposed dead load, kPa2
CONCRETE PROPERTIES
Concrete density, kg/m32,400
Strength @ 28 days, f’c, MPa31
Strength @ release, f’ci, MPa27
Modulus of elasticity @ service, Ec, MPa30,094
PRESTRESSING STEEL (stranded wire properties) - 6mm
Nominal diameter mm6

3-wires, stress relieved, high tensile strands

Ultimate strength, fpu, MPa1,860
Yield strength, fpy, MPa1,582
Modulus of elasticity, Ep, MPa186 x 103
Area of wire, Ap, mm221
PRESTRESSING STEEL (stranded wire properties) - 9mm
Nominal diameter mm9

7-wires, low relaxation, high tensile strands

Ultimate strength, fpu, MPa1,860
Yield strength, fpy, MPa1,630
Modulus of elasticity, Ep, MPa195 x 103
Area of wire, Ap, mm255
CONCRETE SLAB TOPPING
Min. compressive strength @ 28 days, f’c, MPa21
Slab topping thickness, mm

50, 75

Volume 50 mm concrete slab, m3/m20.080
Volume 75 mm concrete slab, m3/m20.105
Wire mesh reinforcement 6 mm ø at 150 mm o.c.
Weight of steel reinforcement kg/m24
DESIGN CONSIDERATIONS
Minimum bearing requirement - concrete beam, mm100
Minimum bearing requirement - steel beam, mm75
Superimposed dead load, kPa2
PRESTRESSING STEEL (stranded wire properties)
Nominal diameter mm69
Wires (high tensile strands)

3-wires, stress relieved

7-wires, low relaxation

Ultimate strength, fpu, MPa1,8601,860
Yield strength, fpy, MPa1,5821,630
Modulus of elasticity, Ep, MPa186 x 103195 x 103
Area of wire, Ap, mm22155

Connection Details

T‑Joist

Typical Installation
Recommended Shoring

T-Joist Notes

1. Shoring must be able to support the dead weight of the concrete slab and the construction live load. Shoring must rest on a firm base and must be adequately braced to prevent settlement or lateral displacement.

2. The steel forms are collapsible and reusable. They support the weight of the concrete slab during pouring and may be removed 3 days after pouring the concrete slab. Shoring of T-joists must remain in place for at least 7 days.

3. T-joists can accommodate the weight of workers.

For more information about
T‑Joist System