Modular Blocks & T‑Joist System
Modular Blocks & T‑Joist System
Jackbilt load-bearing modular blocks.
Typical Applications
Save on forms and concrete. Save time and money.
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.
Strengths: 700 psi to 1500 psi
Applications: basements and below ground installations; warehouses with high walls.
| Size (inches) | Length (mm) | Width (mm) | Height (mm) |
|---|---|---|---|
| 8 | 390 | 190 | 190 |
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) |
|---|---|---|---|
| 4 | 390 | 90 | 190 |
| 6 | 390 | 140 | 190 |
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) |
|---|---|---|
| 200 | 100 | 100 |
| 200 | 100 | 120 |
| 200 | 100 | 150 |
For more information about
Modular Blocks
Modular Blocks & T‑Joist Floor System
T‑JOISTS. Easy to install. No special equipment needed.
T‑JOISTS. Easy to install. No special equipment needed.
Technical Specifications
| CROSS SECTIONAL PROPERTIES | |
|---|---|
| Width, mm | 120 |
| Total height, mm | 143 |
| Cross section net area, mm2 | 12,561 |
| Distance top fiber to neutral axis (ytop), mm | 85 |
| Distance bottom fiber to neutral axis (ybot), mm | 58 |
| Moment of inertia (Ix) mm4 | 20 x 106 |
| Self weight (kgs/lineal m) | 30 |
| DESIGN CONSIDERATIONS | |
|---|---|
| Minimum bearing requirement - concrete beam, mm | 100 |
| Minimum bearing requirement - steel beam, mm | 75 |
| Superimposed dead load, kPa | 2 |
| CONCRETE PROPERTIES | |
|---|---|
| Concrete density, kg/m3 | 2,400 |
| Strength @ 28 days, f’c, MPa | 31 |
| Strength @ release, f’ci, MPa | 27 |
| Modulus of elasticity @ service, Ec, MPa | 30,094 |
| PRESTRESSING STEEL (stranded wire properties) - 6mm | |
|---|---|
| Nominal diameter mm | 6 |
3-wires, stress relieved, high tensile strands | |
| Ultimate strength, fpu, MPa | 1,860 |
| Yield strength, fpy, MPa | 1,582 |
| Modulus of elasticity, Ep, MPa | 186 x 103 |
| Area of wire, Ap, mm2 | 21 |
| PRESTRESSING STEEL (stranded wire properties) - 9mm | |
|---|---|
| Nominal diameter mm | 9 |
7-wires, low relaxation, high tensile strands | |
| Ultimate strength, fpu, MPa | 1,860 |
| Yield strength, fpy, MPa | 1,630 |
| Modulus of elasticity, Ep, MPa | 195 x 103 |
| Area of wire, Ap, mm2 | 55 |
| CONCRETE SLAB TOPPING | |
|---|---|
| Min. compressive strength @ 28 days, f’c, MPa | 21 |
| Slab topping thickness, mm | 50, 75 |
| Volume 50 mm concrete slab, m3/m2 | 0.080 |
| Volume 75 mm concrete slab, m3/m2 | 0.105 |
| Wire mesh reinforcement 6 mm ø at 150 mm o.c. | |
| Weight of steel reinforcement kg/m2 | 4 |
| DESIGN CONSIDERATIONS | |
|---|---|
| Minimum bearing requirement - concrete beam, mm | 100 |
| Minimum bearing requirement - steel beam, mm | 75 |
| Superimposed dead load, kPa | 2 |
| PRESTRESSING STEEL (stranded wire properties) | ||
|---|---|---|
| Nominal diameter mm | 6 | 9 |
| Wires (high tensile strands) | 3-wires, stress relieved | 7-wires, low relaxation |
| Ultimate strength, fpu, MPa | 1,860 | 1,860 |
| Yield strength, fpy, MPa | 1,582 | 1,630 |
| Modulus of elasticity, Ep, MPa | 186 x 103 | 195 x 103 |
| Area of wire, Ap, mm2 | 21 | 55 |
Connection Details
T‑Joist
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.