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440:. A ladder may be used on the side or stern of a boat, to climb into it from the water, and in a swimming pool, to climb out and sometimes in. Swimming pool ladders are usually made from plastic, wood or metal steps with a textured upper surface for grip and metal rails at the sides to support the steps and as handrails for the user, and are usually fixed in place. Boarding ladders for boats may be fixed, but are usually portable, and often fold away when not in use to avoid drag when under way. Boarding ladders may also be used for other types of vehicle, or boarding steps which are supported directly by the vehicle structure.
426:) standard. Electrostatic Discharge is a natural occurrence in which electricity is passed through the body, or other conductors, and discharges onto some object. For example, the shock sometimes felt when a doorknob is touched is an ESD. This natural occurrence is a very important topic in the field of electronics assembly due to the costly damage ESDs can cause to sensitive electronic equipment. Dissipative ladders are ladders with controlled electrical resistance: the resistance slows the transfer of charge from one point to another, offering increased protection during ESD events: ≥10 and < 10 Ω / square.
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the lowest rung and so provides much greater stability to the ladder when being used. However footing a ladder should be seen as a last resort for a safe placement. The anchor point is usually a ring cemented into a slot in the brick wall to which the rungs of a ladder can be attached using rope for example, or a
528:
The
European Union and the United Kingdom established a ladder certification system – ladder classes – for any ladders manufactured or sold in Europe. The certification classes apply solely to ladders that are portable such as stepladders and extension ladders and are broken down into three types of
519:
If a leaning ladder is placed at the wrong angle, the risk of a fall is greatly increased. The safest angle for a ladder is 75.5°; if it is too shallow, the bottom of the ladder is at risk of sliding, and if it is too steep, the ladder may fall backwards. This angle is achieved by following the 4 to
511:
It has become increasingly common to provide anchor points on buildings to which the top rung of an extension ladder can be attached, especially for activities like window cleaning, especially if a fellow worker is not available for "footing" the ladder. Footing occurs when another worker stands on
400:
are used where storage space is extremely limited, weight must be kept to a minimum, or in instances where the object to be climbed is too curved to use a rigid ladder. They may have rigid or flexible rungs. Climbing a rope ladder requires more skill than climbing a rigid ladder, because the ladder
500:
are also likely, depending on the nature of the accident. Ladders can cause injury if they slip on the ground and fall. To avoid this, they tend to have plastic feet or base pads which increase friction with the ground. However, if the plastic is badly worn, the aluminium may contact the ground
475:
478:
477:
473:
472:
480:
479:
651:
520:
1 rule for a ladder placed on a vertical wall: for every four feet of vertical height, the ladder foot should move one foot from the wall. Both scenarios can cause significant injury, and are especially important in industries like construction, which require heavy use of ladders.
580:
noting that many believe a ladder rested against the cross that Christ hung from, making it a symbol of wickedness, betrayal and death. In comedic children's media, the image of a character walking under a ladder being the cause or result of bad luck has become a common trope.
82:, that may be hung from the top. The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK). Rigid ladders are usually portable, but some types are permanently fixed to a structure, building, or equipment. They are commonly made of metal, wood, or
227:, a ladder in the step ladder style with one or more (usually no more than three) one-way hinges. Ideal for use on uneven ground (e.g. stairs), as a trestle or when fully extended a Fixed ladder. Some variations feature a central one-way hinge with extensible locking legs.
476:
501:
increasing the chance of an accident. Ladder stabilizers are also available to increase the ladder's grip on the ground. One of the first ladder stabilizers or ladder feet was offered in 1936 and today they are standard equipment on most large ladders.
608:
529:
certification. Each ladder certification is colour-coded to indicate the amount of weight the ladder is designed to hold, the certification class and its use. The color of the safety label specifies the class and use.
196:
Extension ladder or "telescopic ladder", a fixed ladder divided into two or more lengths for more convenient storage; the lengths can be slid together for storage or slid apart to expand the length of the ladder; a
474:
592:
282:
Step ladder, a self-supporting portable ladder hinged in the middle to form an inverted V, with stays to keep the two halves at a fixed angle. Step ladders have flat steps and a hinged back.
243:
are self-supporting structures that have wheels or castors making them easy to move. They sometimes have a small upper platform and a hand rail to assist in moving up and down the steps.
504:
A ladder standoff, or stay, is a device fitted to the top of a ladder to hold it away from the wall. This enables the ladder to clear overhanging obstacles, such as the eaves of a
874:
848:
572:
representing the trinity of the gods, and passing through the triangular shape made by a ladder against a wall was seen as desecration. Ladders have also been linked to the
508:, and increases the safe working height for a given length of ladder because of the increased separation distance of the two contact points at the top of the ladder.
405:. Jacob's ladders used on a ship are used mostly for emergencies or for temporary access to the side of a ship. Steel and aluminum wire ladders are sometimes used in
70:
commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a
1234:
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use "bangor poles", "tormentor poles" or "stay poles" to help raise, pivot, steady, extend, place, retract and lower them due to the heavy weight.
662:
2241:
1480:
1045:
725:
174:
Chicken ladder, a ladder comprising a single central stile with each rung projecting on either side and used by chickens to climb into a coop.
1246:
Ladders 101 - American Ladder
Institute. Includes use & care of different types of ladders, ladder terms & links to safety standards.
1171:
1138:
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710:
193:, a fixed ladder with a lower sliding part. A system of counterweights is used to let the lower sliding part descend gently when released.
279:, also known as a builder's ladder, has sections that come apart and are interchangeable so that any number of sections can be connected.
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1445:
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system may be fitted so that the ladder can be easily extended by an operator on the ground then locked in place using the
409:, having developed from rope ladders with wooden rungs. Flexible ladders are also sometimes used as swim ladders on boats.
1067:
1522:
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796:
249:, a three legged step ladder with the third leg made so that it can be inserted between tree branches for fruit picking.
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1205:(Animation, Short, Comedy, Family), David Kerman, Dorothy Lloyd, Clarence Nash, Paul Norby, Walt Disney Productions,
1004:
556:. Some sources claim that this stems from the image of a ladder being propped up against a wall looking similar to a
871:"Workplace Solutions: Preventing Worker Deaths and Injuries from Contacting Overhead Power Lines with Metal Ladders"
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1671:
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257:, a step ladder with a large platform area and a top handrail for the user to hold while working on the platform.
1976:
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Cat ladder (US chicken ladder), a lightweight ladder frame used on steep roofs to prevent workers from sliding.
181:
which has a single central rail and is open at the sides to allow the diver to climb the ladder while wearing
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Class 1 ladder – for heavy-duty industrial uses, maximum load of 175 kg. Colour-coded blue to identify.
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33:
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775:
Wilson, Bee (2004). The Hive: The Story Of The
Honeybee. London, Great Britain: John Murray (Publishers).
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553:
168:, a ladder used to climb onto a vehicle. May be rigid or flexible, also boarding step(s), and swim ladder.
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1455:
904:
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Class III ladders – for light, domestic uses, maximum load of 125 kg. Colour-coded red to identify.
365:
209:. 65 ft (20 m), 50 ft (15 m) and some 35 ft (10 m) extension ladders for
99:
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Vertically rising ladder, designed to climb high points and facilitate suspending at said high points.
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1961:
1495:
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1041:
573:
165:
139:
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296:, commonly used to refer to a hybrid between a step ladder and an extension ladder with 360-degree
240:
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818:
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2046:
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Class EN131 ladders – for commercial uses, maximum load of 150 kg. No specific colour code..
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63:
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40:
50:
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990:
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406:
103:
870:
271:
ladder, a rigid ladder with a large hook at the top to grip the ridge of a pitched roof.
162:, a ladder laid horizontally to act as a passage between two points separated by a drop.
114:. The ladder is depicted as long and flexible, possibly made out of some sort of grass.
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On the right hand page are types of ladders from the end of the 15th century in
Germany
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234:
145:
67:
44:
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219:, two side members joined by several rungs; affixed to structure with no moving parts.
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1981:
1971:
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341:
328:
X-deck ladder, a US patented ladder design that is a combination ladder and scaffold.
246:
462:
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2023:
2013:
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265:, a ladder that looks like a drainpipe but can be deployed instantly when required.
237:, a rigid ladder with a hook at the top to grip a windowsill; used by firefighters.
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127:
95:
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322:, an extension ladder fitted to rotating platform on top of a fire truck.
182:
107:
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in
English-speaking countries is that walking under a ladder is seen as
300:; has three parts and can be taken apart to form two step ladders; e.g.
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2001:
1933:
1923:
1903:
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1856:
1818:
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148:, used in siege warfare to assist in climbing walls and crossing moats.
1241:
CDC – NIOSH Update – New NIOSH Smart Phone App
Addresses Ladder Safety
2111:
2018:
1823:
1338:
1307:
668:
Sketch of Cat Ladder (UK terminology), which aids work on steep roofs
198:
288:, a ladder used by swimmers to get out of the water, often on boats.
94:
Ladders are ancient tools and technology. A ladder is featured in a
154:, pulled down from the ceiling to allow access to an attic or loft.
1913:
1302:
1297:
1163:
Arthur and the Bad-Luck Brain: A Marc Brown Arthur
Chapter Book 30
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453:
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331:
297:
126:
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49:
106:. The painting depicts two humans using a ladder to reach a wild
98:
rock painting that is at least 10,000 years old, depicted in the
2121:
1812:
1541:
1040:
Simeonov, Peter; Hsiao, Hongwei; Powers, John (27 August 2013).
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349:
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206:
75:
71:
1511:
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became more common because of its lighter weight. Ladders with
1848:
1789:
1354:
704:
A roof ladder, held in place by hooks extending over the ridge
39:"Step ladder" redirects here. For the EP by Teddy Geiger, see
845:"Collapsible Platform For Maintenance Tasks – Patent 7204343"
484:
A video on ladder fall injuries in the United States in 2011
959:. Naval Institute Press, Annapolis, Maryland. p. 122.
86:, but they have been known to be made of tough plastic.
1100:"Why is walking under a ladder supposed to be unlucky?"
757:
Pages displaying short descriptions of redirect targets
142:, portable steps down the side of a ship for boarding.
875:
National
Institute for Occupational Safety and Health
177:
Christmas tree ladder, a type of boarding ladder for
135:
Rigid ladders are available in many forms, such as:
2034:
1932:
1847:
1788:
1722:
1632:
1552:
1005:"Safe Use of Ladders and Stepladders-A brief guide"
1131:"The Surprising Origins of 9 Common Superstitions"
488:The most common injury made by ladder climbers is
27:Vertical or steeply inclined set of rungs or steps
1003:Health and Safety Executive, HSE (January 2014).
980:"Metal Rubber Feet for Ladder Prevents Slipping"
316:"-style ladder with a telescoping center section.
955:Cutler, Deborah W. and Thomas J. Cutler (2005).
1073:. Health & Safety Executive. Archived from
749: – Using ladders to scale defensive walls
656:Photo of a dog and pawl on an extension ladder
74:, and rollable ladders, such as those made of
1523:
1266:
8:
1068:"Safety in the selection and use of ladders"
1530:
1516:
1508:
1273:
1259:
1251:
692:Detail of a bamboo ladder, common in China
1166:. Little, Brown Books for Young Readers.
882:
626:A ladder used for ceremonial purposes in
43:. For the sports tournament bracket, see
1237:approved rung spacing requirements, etc.
1129:Wolchover, Natalie (19 September 2011).
1042:"Ladder Safety: There's an App for That"
716:Lightweight aluminum ladder used in the
768:
588:
372:patented the extension ladder in 1867.
360:stiles are used for working on or near
913:
902:
364:, because fiberglass is an electrical
348:Rigid ladders were originally made of
1141:from the original on 27 November 2020
819:"Patent and Trademark Office Notices"
755: – Room where stairs are located
7:
2162:
1110:from the original on 8 November 2020
1048:from the original on 16 January 2015
799:from the original on 7 December 2013
2184:
422:are portable ladders built to ESD (
1180:from the original on 23 March 2023
932:"Improved extension-ladder patent"
847:. Docstoc.com. 27 September 2010.
384:An aluminium ladder being used in
25:
851:from the original on 5 March 2014
680:Sketch of double extension ladder
2183:
2161:
2140:
2139:
1623:
993:article at bottom left of pg 499
891:from the original on 28 May 2015
825:from the original on 1 June 2013
724:
709:
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673:
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649:
634:
619:
607:
598:Rough ladder instead of stairs,
591:
45:Playoff format § Stepladder
1209:from the original on 5 May 2021
1160:Brown, Marc (1 November 2003).
560:, while others attribute it to
492:from falling off a ladder, but
458:Skid mark from a faulty ladder.
1199:King, Jack (13 January 1939),
793:"Diving Equipment Specialties"
466:Safe setup of a leaning ladder
131:An aluminum stepladder, folded
1:
576:, with author and scientist
66:or inclined set of rungs or
2295:
352:, but in the 20th century
38:
31:
2135:
1672:Hemispherical photography
1621:
1430:
1293:
957:Dictionary of Naval Terms
430:Boarding and pool ladders
362:overhead electrical wires
2232:Machine and metalworking
1977:Lombard Steam Log Hauler
1471:Machine and metalworking
884:10.26616/NIOSHPUB2007155
2242:Measuring and alignment
1481:Measuring and alignment
735:, a type of rope ladder
424:Electrostatic Discharge
34:Ladder (disambiguation)
1231:OSHA Ladder guidelines
912:Cite journal requires
485:
467:
459:
401:tends to swing like a
389:
345:
190:Counterbalanced ladder
132:
55:
795:. Techdivetools.com.
574:crucifixion of Christ
564:traditions involving
483:
465:
457:
383:
335:
130:
53:
2207:Cutting and abrasive
2189:WikiProject Forestry
1446:Cutting and abrasive
140:Accommodation ladder
32:For other uses, see
1732:Aerial firefighting
1080:on 18 November 2012
544:Society and culture
420:Dissipative ladders
241:Mobile Safety Steps
54:An extension ladder
2072:Hydraulic debarker
2047:Firewood processor
1202:Donald's Lucky Day
989:2017-03-27 at the
877:. September 2007.
486:
468:
460:
390:
346:
293:Telescoping ladder
262:Retractable ladder
133:
56:
2266:
2265:
2077:Log house moulder
1603:Tree planting bar
1578:Groasis Waterboxx
1505:
1504:
1173:978-0-316-12650-2
1106:. 6 August 2015.
966:978-1-59114-150-1
602:, HP, India, 2010
481:
370:Henry Quackenbush
90:Historical usages
16:(Redirected from
2286:
2187:
2186:
2165:
2164:
2143:
2142:
2122:Wood-drying kiln
2057:Forestry mulcher
2007:Washington Winch
1909:Portable sawmill
1724:Fire suppression
1627:
1532:
1525:
1518:
1509:
1365:Needlegun scaler
1275:
1268:
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1014:. Archived from
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994:
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644:ladder in Africa
638:
623:
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562:ancient Egyptian
482:
376:Flexible ladders
320:Turntable ladder
311:
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294:
278:
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276:Sectional ladder
264:
263:
256:
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110:nest to harvest
41:Step Ladder (EP)
21:
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2284:
2283:
2269:
2268:
2267:
2262:
2261:
2131:
2030:
1928:
1877:safety features
1872:safety clothing
1843:
1784:
1718:
1682:Increment borer
1628:
1619:
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1548:
1536:
1506:
1501:
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1385:Pressure washer
1360:Mop bucket cart
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1279:
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1135:livescience.com
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1038:
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1021:on 13 July 2018
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1001:
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991:Wayback Machine
982:Popular Science
978:
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496:are common and
470:
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444:Assault ladders
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407:vertical caving
398:Jacob's ladders
378:
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307:
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275:
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254:Platform ladder
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166:Boarding ladder
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104:Valencia, Spain
92:
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2197:Types of tools
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2052:Forest railway
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2016:
2011:
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1947:Feller buncher
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1839:Splitting maul
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1764:Fire retardant
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1652:Biltmore stick
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494:bone fractures
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386:Riverbend Cave
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309:Trestle ladder
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19:
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2144:
2062:Hand compass
2014:Steam donkey
1899:Lumber edger
1884:Crosscut saw
1829:Log splitter
1754:Fire flapper
1709:Tree caliper
1677:Inclinometer
1662:Cruising rod
1611:(Tuley tube)
1609:Tree shelter
1605:(dibble bar)
1593:Root trainer
1414:
1375:Pipe cleaner
1349:
1337:
1328:Floor buffer
1211:, retrieved
1201:
1194:
1182:. Retrieved
1162:
1155:
1143:. Retrieved
1134:
1124:
1112:. Retrieved
1103:
1094:
1082:. Retrieved
1075:the original
1062:
1050:. Retrieved
1035:
1023:. Retrieved
1016:the original
1011:
998:
984:, April 1936
981:
975:
956:
950:
938:. Retrieved
926:
905:cite journal
893:. Retrieved
865:
853:. Retrieved
839:
827:. Retrieved
813:
801:. Retrieved
787:
771:
733:pilot ladder
550:superstition
547:
527:
518:
510:
503:
487:
443:
438:dive ladders
437:
434:swim ladders
433:
429:
419:
397:
394:Rope ladders
393:
347:
336:Ladder of a
302:Little Giant
217:Fixed ladder
211:fire service
152:Attic ladder
134:
100:Spider Caves
93:
59:
57:
29:
2257:Woodworking
2127:Woodchipper
1919:Two-man saw
1834:Marking axe
1815:(shake axe)
1714:Wedge prism
1687:Rangefinder
1647:Angle gauge
1634:Mensuration
1567:Caulk boots
1496:Woodworking
1395:Sandblaster
1213:25 November
1184:26 November
1145:25 November
1114:25 November
1012:hse.gov.uk/
338:fire escape
286:Swim ladder
231:Hook ladder
18:Rope ladder
2145:Categories
1967:Helicopter
1808:Brush hook
1642:3D scanner
1615:Tree spade
1588:Pottiputki
1233:including
1052:15 January
895:16 January
763:References
358:fiberglass
118:Variations
96:Mesolithic
84:fiberglass
2177:equipment
2155:equipment
2107:Tree tyer
2087:Log flume
2067:Hand hook
1997:Skid cone
1992:Pike pole
1987:Pickaroon
1972:Log truck
1962:Harvester
1952:Forwarder
1942:Cant hook
1776:(rakehoe)
1759:Fire rake
1749:Driptorch
1704:Relascope
1699:Microtome
1598:Seed trap
1546:equipment
1410:Steam mop
1380:Pith wood
1345:Holystone
628:Indonesia
570:triangles
548:A common
514:carabiner
366:insulator
354:aluminium
80:aluminium
2273:Category
2212:Forestry
2202:Cleaning
2082:Log pond
2042:Denailer
1957:Go-devil
1894:Head saw
1867:Chainsaw
1803:Broadaxe
1798:Billhook
1769:Helitack
1574:(hoedag)
1539:Forestry
1451:Forestry
1441:Cleaning
1405:Squeegee
1370:Peg wood
1207:archived
1178:Archived
1139:Archived
1108:Archived
1046:Archived
987:Archived
889:Archived
849:Archived
823:Archived
797:Archived
753:Stairway
747:Escalade
741:See also
566:pyramids
554:bad luck
490:bruising
403:pendulum
342:New York
183:swimfins
108:honeybee
64:vertical
2279:Ladders
2237:Masonry
2227:Kitchen
2167:Commons
2092:Machete
2002:Skidder
1934:Logging
1924:Whipsaw
1904:Polesaw
1889:Dragsaw
1862:Bucksaw
1857:Bow saw
1819:Hatchet
1780:Pulaski
1583:Mattock
1476:Masonry
1466:Kitchen
1416:Tawashi
1318:Dustpan
1025:22 June
940:20 June
855:5 March
829:5 March
803:5 March
558:gallows
432:, also
314:A-Frame
2247:Mining
2217:Garden
2112:Tsakat
2019:Yarder
1982:Peavey
1824:Labrys
1774:McLeod
1572:Hoedad
1486:Mining
1456:Garden
1400:Sponge
1350:Ladder
1339:Hataki
1308:Bucket
1170:
1084:17 May
963:
779:
450:Safety
388:, 2006
312:, an "
298:hinges
199:pulley
179:divers
60:ladder
2252:Power
2172:tools
2150:tools
2035:Other
2024:swing
1914:Resaw
1737:DC-10
1692:laser
1657:Chain
1542:tools
1491:Power
1303:Brush
1298:Broom
1078:(PDF)
1071:(PDF)
1019:(PDF)
1008:(PDF)
935:(PDF)
642:Dogon
207:pawls
112:honey
68:steps
62:is a
2222:Hand
1849:Saws
1813:Froe
1790:Axes
1742:UAVs
1544:and
1461:Hand
1286:List
1235:OSHA
1215:2020
1186:2021
1168:ISBN
1147:2020
1116:2020
1086:2014
1054:2015
1027:2018
961:ISBN
942:2012
918:help
897:2015
857:2014
831:2014
805:2014
777:ISBN
600:Nako
568:and
506:roof
436:and
414:Uses
350:wood
269:Roof
205:and
203:dogs
76:rope
72:wall
1355:Mop
879:doi
396:or
340:in
233:or
102:in
78:or
2275::
1176:.
1137:.
1133:.
1102:.
1044:.
1010:.
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344:.
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185:.
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20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
