Stack Weight • Vertical Compression • Ship Acceleration • Transverse Shear • Twistlocks • Lashing Rods • Wind • CSM / Lashing Software Screen
Container Lashing & Stack Load Tool
Screen a deck-container stack using actual container weights and ship-specific securing limits. Simple mode checks total stack compression and transverse securing demand. Advanced works tier by tier, carrying the weight and inertia of every container above each interface and comparing those demands with user-entered CSM/class limits for vertical compression, twistlock shear/tension and lashing-rod capacity.
↑
Need tier-by-tier weights, twistlock limits and rod angles? Click Advanced above.Simple uses an average-weight stack and nominal summed securing capacity. The ship’s approved lashing computer and Cargo Securing Manual remain controlling.StackVertical compression load
TransverseInertia + wind restraint
LashingsRod & twistlock margin
Stack & Design Accelerations
tonnes.
m.
g, user-entered ship/route/position basis.
g. Compression factor = 1 + az.
kPa on exposed stack side area.
m².
Entered Securing Limits
kN, from CSM/class/lashing software.
kN across bottom interface.
degrees.
kN from approved securing basis.
Stack / Voyage Design Basis
g.
g.
g. Downward compression uses 1+az; uplift screen uses 1−az.
m.
kPa.
1.00 if entered accelerations already contain the approved dynamic basis.
Tier / Interface Register
Tier 1 is the bottom container. Interface limits entered on each row apply immediately below that tier, carrying that tier and every active tier above it. All allowable loads must come from the ship’s approved Cargo Securing Manual, lashing software, class documentation or certified equipment data.
| Use | Gross wt t | Max gross t | Height m | Exposed side area m² | Permissible vertical compression kN | Twistlock shear allowance kN | Twistlock tension allowance kN | Racking screen limit kN | Lashing rods | Rod angle ° from horiz. | Rod allowable kN each |
|---|
Container Securing Checks
Critical limitation: this is not approved container lashing software. It uses a simplified static load-path screen and cannot reproduce class-specific nonlinear 3D lashing calculations, twistlock clearances, hatch-cover/lashing-bridge deformation, container-frame flexibility, dynamic contact forces or exact rod/twistlock force sharing. The approved Cargo Securing Manual and approved lashing software remain controlling.