Match the diagram conditions, then follow the example inputs and results. Change numerical values in the calculator.
1. Match the diagram to your question
2本の吊り具で左右対称に吊るす例です。角度θは鉛直線から測ります。
荷物の質量m、本数n、鉛直からの角度θを入力します。不均等な分担はこの図の条件とは異なります。
吊り荷全体の質量 m
100 kg
均等に負担する有効本数 n
2本
鉛直からの角度 θ
30 °
荷重に掛ける比較倍率 k
1
1本の比較用使用荷重（力）
1,000 N
橙のTは1本あたりの張力です。吊り具が寝るほど、張力と横に引く成分が増えます。
T · 1本あたりの張力 T
566.187 N
1本あたりの水平分力
283.094 N
入力した比較用使用荷重に対する比
56.6187 %
Two symmetric sling legs support the load. Angle θ is measured from vertical.
Enter mass m, leg count n and angle θ from vertical. Unequal sharing differs from this model.
Total lifted mass m
100 kg
Effective equally loaded legs n
2 legs
Angle θ measured from vertical
30 °
Comparison load multiplier k
1
Working-load force for one leg, for comparison
1,000 N
Orange T is tension in one leg. Flatter slings increase tension and horizontal components.
T · Tension T per effective leg
566.187 N
Horizontal component per leg
283.094 N
Fraction of entered working load
56.6187 %
Blue marks inputs; orange marks outputs. These diagrams explain the fixed example below; dimensions and deformation are not drawn to physical scale.
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2. Example inputs
Total lifted mass mWhat goes here?
This is mass, including fixtures or loads that move with it where required. Kilograms describe mass; newtons describe force.
100 kg
Effective equally loaded legs nWhat goes here?
Choose the option matching your mechanism and diagram. A different model can change required inputs and applicable results.
2 legs
Angle θ measured from verticalWhat goes here?
Match the field symbol to the diagram and check dimensions, specifications or operating conditions. Replace example numbers with your actual conditions.
30 °
Comparison load multiplier kWhat goes here?
A comparison multiplier applied to the stated load or moment.
Examples are not code safety factors. Specify a factor for the actual equipment, load and applicable requirements; it does not by itself account for impact or uneven loading.
Choose values for actual contact, lubrication, temperature and other conditions. These initial values are examples.
1
Working-load force for one leg, for comparisonWhat goes here?
This is the stress comparison criterion. Yield stress differs from allowable stress; match material condition, use and safety factor.
1,000 N
These are fixed teaching inputs. Coefficients, properties and comparison limits are not recommendations. Enter your conditions in the calculator.
3. Results for this example
Tension T per effective leg
566.187 N
Horizontal component per leg
283.094 N
Fraction of entered working load
56.6187 %
Angles are measured from vertical. Greater angle increases tension and horizontal force. The example uses two symmetric, equally loaded legs.
4. Which formula is used?
T=kmg/(n cosθ); H=T sinθ.
Table units are not always the units required in the formula. The calculator converts selected units to its internal base units before computing.
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Assumptions and exclusions
Ideal static symmetric equal sharing. Measure angle from vertical, not horizontal. Verify effective leg count from the equipment, arrangement and CG; four legs do not automatically mean four-way sharing. Eccentricity, hitch reductions, bending, terminations, lifting points, shock, rigging procedure and legal suitability are not assessed.
