Surge Series

Surge-8

Name: Surge-8
Brand: Ropebraiders

Eight-strand plaited nylon built to absorb what the sea delivers.

8-Strand PlaitedNylon Splice 100%

Schematic — Four pairs, plaited

Four pairs of high-tenacity nylon, two right-laid and two left-laid. It will not kink, hockle or unlay, and 20% elongation turns surge into heat.

When to specify this

Specify Surge-8 where energy absorption is the job: exposed-berth mooring, tow springs, anchor rodes. Where stretch is the enemy, go to Vector-PC.

Engineering notes

Torque-balanced plait runs freely off a pile and will not build twist
20% elongation at break. The highest energy absorption we offer
Flattens under load to spread pressure across bollards and bitts
Spliceable to full strength with a standard tuck splice

At a glance

Max break strength: 202,000 lb
Diameter range: 3/4" – 3"
Construction: 8-Strand Plaited
Fibre: Nylon
Elongation @ 30% MBS: 12.5%
Splice efficiency: 100%
Torque balanced: Yes

Standard colours

Black · White · Signal Red tracer

Certification

ISO 9001 batch traceability
OCIMF MEG4 aligned documentation

Request a quote Calculate working load

Full spec sheet and batch test certificate supplied with every order, and on request beforehand.

Typical applications

Specifications

Minimum break strength is the value we publish and test to — not an average, and not a working load. Divide by your design factor before putting a number on a drawing.

Surge-8 specifications by nominal diameter
Diameter	Min. break strength (lb)	Weight (lb/100 ft)	Working load @ 5:1
3/4"	14,500	14.5	2,900 lb
1"	25,000	26	5,000 lb
1-1/4"	38,500	40	7,700 lb
1-1/2"	54,500	58	10,900 lb
1-3/4"	73,000	78	14,600 lb
2"	94,000	101	18,800 lb
2-1/2"	143,000	158	28,600 lb
3"	202,000	227	40,400 lb

Working load shown at a 5:1 design factor for illustration only. Use the load calculator to apply the design factor, sling angle and termination efficiency your application actually requires.

Weights are nominal and vary ±5% with finish and coating. Elongation measured on new rope after bedding-in; expect higher values on the first cycle. Splice efficiency assumes a correctly made splice with the specified bury length.

Load against elongation

Measured to 30% of MBS. Beyond that the curve is extrapolated from the fibre, and drawn dashed to say so.

Load vs. elongation

Surge-8 — stretch under load

Elongation as a percentage of original length, plotted against load as a percentage of minimum break strength. Drag, or focus the plot and use the arrow keys, to read any point off the curve.

Elongation: 12.5 %
Load: 30 % MBS
Stretch / 100 ft: 150 in
Source: Measured

Solid — measured at 10, 20 and 30% of minimum break strength, interpolated with a monotone cubic so the fit cannot overshoot.
Dashed — extrapolated to 20% using published Nylon elongation at break. Inferred, not measured. Do not design to it.
Shaded — working load at a 5:1 design factor, i.e. up to 20% of MBS.

Surge-8 load against elongation. Load is a percentage of minimum break strength; elongation is a percentage of original length.
Load (% of MBS)	Elongation (%)	Source
0	0	Origin
10	4.5	Measured
20	8.5	Measured
30	12.5	Measured
100 (break)	20	Extrapolated from Nylon elongation at break

Strength to weight

Break strength per pound of rope, across the catalogue. This is the number that decides what a two-person crew can rig.

Strength-to-weight

12 ropes, ranked highest first

STRENGTH-TO-WEIGHT — LB PER LB/100 FT

Break strength divided by weight per 100 ft, best size in each range. Numerically this is breaking length in hundreds of feet — the length of rope whose own weight equals its break strength.

Strength-to-weight by product, highest first, in lb per lb/100 ft.
Rank	Product	Strength-to-weight
1	Apex-12	6,615
2	Apex-12 MAX	6,290
3	Vector-PC	3,793
4	Thermion-AR	3,136
5	Datum-LCP	3,125
6	Meridian Hybrid	2,663
7	Ascent NFPA-G	1,322
8	Meridian-DB	1,143
9	Canopy-24	1,063
10	Harbour-3	1,040
11	Surge-8 (this rope)	1,000
12	Drift-PP	809