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Topic: Slip critical joint

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	Slip - Wikipedia, the free encyclopedia
		Slips are usually caused by inadequate synchronization of the two clocks controlling the transmission or by poor reception of the signal.
		In boating, a slip is a ramp used to move boats and flying boats to and from the water.
		In vehicle dynamics, slip is the relative motion between a tyre and the road surface it is moving on.
	en.wikipedia.org /wiki/Slip (475 words)

	Educational Bulletin 5 (Site not responding. Last check: 2007-10-29)
		The 1994 edition retains the earlier requirement in Section 8(c) that bolts in connections that are not slip critical be tightened to the snug tight condition, and retains the definition of snug tight as the tightness that exists when the plies of the joint are in firm contact.
		Slip capacity is dependent upon the slip coefficient of the faying surfaces and the total contact force between the surfaces, not upon the area of contact.
		Since the slip load is dependent upon the total contact force between the plies (equal to the sum of the bolt tensions in the connection), low tension in any of the bolts can lead to reduced slip capacity.
	www.boltcouncil.org /educ5.htm (1183 words)

	Slip critical joint - Wikipedia, the free encyclopedia
		A slip-critical joint, from structural engineering, is a joint which relies on friction (rather than shear or tensile strength) to hold two things in place.
		The most common slip-critical joint is where a girder meets a larger beam.
		The joint ensures that the load is on the structural members and not on the bolt, so it creates a more efficient loading condition.
	en.wikipedia.org /wiki/Slip_critical_joint (200 words)

	NONLINEAR SEISMIC ANALYSIS OF ARCH DAMS USING SLIP-JOINT ELEMENTS (Site not responding. Last check: 2007-10-29)
		The joint itself may be considered to be composed of the irregular boundary surfaces, plus the volume enclosed by these surfaces, plus some volume of the contiguous rock or structure affected by the presence of the joint.
		Collision at a joint compression sub-element occurs when simultaneously the sub-element goes from a tension condition (condition "1") to a compression or slipping condition (conditions "2" or "3") and the relative velocity across the sub-element is negative, i.e.
		The shear stiffness in the joint elements is large enough that the response of the horizontally jointed model does not differ from the continuous plate response until slipping begins in the joint elements.
	www.public.asu.edu /~avixx/Documents/techequ/techequ.htm (5988 words)

	Connections using Hot-Dip Galvanized Bolts (Site not responding. Last check: 2007-10-29)
		Slip factors were found to improve considerably when the galvanized surfaces were treated with a wire brush; brush-off grit-blasted, or painted with zinc-silicate paint.
		The slip factor was found to improve considerably when the galvanized surfaces were wire-brushed, brush-off grit-blasted, or painted with zinc-silicate paint.
		The increased frictional resistance after initial slip for galvanized joints is thought to result from galling of the relatively soft and uneven zinc coating on the faying surface.
	www.galvanizeit.org /showContent,171,213.cfm (512 words)

	Technial Note 18a
		Generally, spacing of expansion joints is determined by considering the amount of expected wall movement and the size of compressibility of the expansion joint and expansion joint materials.
		For example, if the spacing between vertical expansion joints on a straight wall is 25 ft (7.6 m), then the spacing of expansion joints around a corner could be 10 ft (3.0 m) on one side of the corner and 15 ft (4.6 m) on the other side.
		Expansion joints are used in brick masonry to allow for the movement generated by materials as they react to their own properties, environmental conditions and loads.
	www.bia.org /BIA/technotes/t18a.htm (3826 words)

	Slip Rings
		A slip ring is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure.
		Also called a rotary electrical joint, collector or electric swivel, a slip ring can be used in any electromechanical system that requires un-restrained, intermittent or continuous rotation while transmitting power and/or data.
		Slip rings are typically used in de-icing and blade-folding systems and main and tail rotors.
	www.polysci.com /SlipRings/slipring.html (583 words)

	Slip Ring Assemblies - Airflyte Electronics is a manufacturer and designer of (Site not responding. Last check: 2007-10-29)
		In critical applications it is often necessary to transmit current in the micro-volt region over a relatively narrow band pass (10KHz).
		Since slip rings are often used as rotary joints to transmit currents and voltages in the RF or IF range, it has become necessary to consider a co-axial design.
		In general, the diameter of the slip ring should be kept as small as possible to provide a low surface speed which reduces the generated heat and also lessens the dynamic unbalance.
	www.airflyteelectronics.com /^AirFlyte/Design/Problem.aspx (902 words)

	Kevlin - Products - Rotary Joints
		It is an electro-mechanical device that provides the critical interface between the stationary and rotating sections of a radar system; allowing signals to be transmitted back and forth between the antenna and ground components with little or no distortion.
		Kevlin Corporation is the leading designer and manufacturer of microwave rotary joints in the world with over 40 years experience in the industry.
		A rotary joint is a passive rotating transmission line that has the ability to pass D.C. and R.F. signals with minimal degradation.
	www.kevlin.com /products/rotary-joints/index.asp (234 words)

	ICC Online \| Certification & Testing \| Structural Steel and Bolting Special Inspector (Site not responding. Last check: 2007-10-29)
		According to the specification for structural joints using high-strength bolts, the nominal diameter of standard bolt holes shall be _____ inch larger than the nominal bolt diameter.
		According to the specification for structural joints using high-strength bolts, the minimum length of a high strength bolt shall be such that the end of the bolt is _____ the outside face of the nut when completely installed.
		According to the Specification for Structural Joints using A325/A490 bolts, the minimum number of hardened washers required in a slip-critical joint when an ASTM A490 bolt is used to connect ASTM A36 steel members is _____.
	www.iccsafe.org /certification/ssb.html (532 words)

	Military.com Content
		The Goldwater-Nichols Reorganization Act of 1986 was not the birth of jointness and joint operational art; it was its rebirth.
		We are now at another critical fork in the road; we can either embrace our lessons from the past and push beyond our current level of joint operational art or be seduced by yet another alluring revolution in military affairs.
		His joint principle of unity of command is embedded in today's doctrine in the form of the Joint Task Force, the preferred operational command structure for war fighting.
	www.military.com /Content/MoreContent1?file=NI_Joint (2591 words)

	Snugging the Joint (Site not responding. Last check: 2007-10-29)
		For all other connections, those designated pretensioned shear-bearing, slip critical or direct tension, snugging the joint is a very important step in tightening the bolts.
		The "snug tight condition" is defined as "the tightness attained by either a few hits of an impact wrench or the full effort of a worker with an ordinary spud wrench that brings the connected plies into firm contact" by the most recent AISC LRFD Specification (Dec. 1, 1993), Section J3.1.
		The most critical aspect of snugging is that there be no gaps remaining between the layers of steel where the bolts penetrate the steel.
	www.steelstructures.com /SBH/SBH_snugging.htm (368 words)

	Beam-Column Joints Tested for Reinforced Concrete Highway Structures
		The design details that were expected to control the seismic performance of the joint included grade 40 column bars that projected straight in the joint, with development lengths of 20 times the bar diameter, minimal beam positive moment reinforcement continuous through the joint, and no joint transverse reinforcement.
		This conclusion is based on data from the instrumentation measuring the slip of the embedded ends of the column bars with respect to the top of the beam and is based on the observed crack pattern in the joint that clearly delineated the location of the column bars embedded within the joint.
		However, the observed cracking in the joint region was typical of what would be expected if the joint were overstressed in shear, and as loading of the joint continued beyond the yield point, significant slip of column bars and inelastic joint shear strain were observed.
	nisee.berkeley.edu /lessons/lowes.html (1172 words)

	eMedicine - Interphalangeal Joint Arthritis : Article by Carlos Garcia-Moral, MD (Site not responding. Last check: 2007-10-29)
		Relevant Anatomy: The PIP joint is a ginglymus joint, or hinged joint, with a functional stability throughout its normal arc of flexion and extension.
		The central slip of the extensor digitorum communis tendon attaches to the dorsal lip of the middle phalanx.
		Contraindications: Arthrodesis and implant arthroplasty of the PIP joint are contraindicated in the presence of recent or chronic infection or in infirm individuals unable to sustain the rigors of elective surgical intervention.
	www.emedicine.com /orthoped/topic406.htm (3540 words)

	Case Based Pediatrics Chapter
		Growth of the hip joint is dependent on mechanical and genetic factors.
		Treatment must be directed in achieving a concentric reduction of the femoral head in the acetabulum, stability of the hip joint, and proper remodeling of the growth cartilages throughout childhood.
		The critical concept is the containment of the femoral head in the acetabulum through the period of risk of deformity (19).
	www.hawaii.edu /medicine/pediatrics/pedtext/s19c06.html (3785 words)

	Basics of Design Engineering - Fastening & Joining - Joint Design - Stable Bolted Joints
		Reliable joints require a firm, strong connection, materials that are stable in the environment, stable geometry, and appropriate stresses in the parts, including a correct clamping force.
		Joints and bolts must deflect elastically but must be rigid enough to provide structural integrity.
		For example, if the joint will be loaded in shear, thread runout on the bolts should not coincide with the shear plane between joint members.
	www.machinedesign.com /BDE/FASTENING/bdefj2/bdefj2_1.html (808 words)

	Joint Medical Evacuation
		The second critical juncture in the medical evacuation process occurs after battlefield ground or air evacuation and treatment and is the follow-on evacuation, when Army medics transfer casualties to the Air Force for movement to the corps rear area or the communications zone.
		Initial patient evacuation is a critical task in all operations and is addressed in every unit's standing operating procedures and in every commander's plan.
		Once collocated with an Army activity, the aeromedical evacuation liaison team is the critical bridge for communication between the Army and the Air Force's mobile aeromedical staging facility during joint evacuation.
	www.almc.army.mil /alog/issues/JanFeb00/MS477.htm (2782 words)

	Joint Types (Site not responding. Last check: 2007-10-29)
		In this joint, the load is transferred from the steel into the bolt by bearing against the shank of the bolt, carried through the bolt by shear, then into the next layer of steel by bearing of the bolt against the side of the bolt hole.
		These joints include certain column splices, certain connections in crane buildings, certain beam-to-column connections in taller buildings, connections of members supporting running machinery or loads that produce impact or stress reversal, or any other connections so designated by the Engineer.
		The third type of joint is the direct tension (DT) joint, called such because the bolts receive direct applied loading from the structure.
	www.steelstructures.com /SBH/SBH_joints.htm (419 words)

	Research (Site not responding. Last check: 2007-10-29)
		Their experiments were with 2-D plates of uniform, brittle materials, and we intend to expand this analysis to granular, heterogeneous materials, and to explore the effects of 3-D structures.
		The present structural analysis of the western margins of the DSB indicates distinct strain partitioning: the horizontal component of slip is accommodated along a subvertical fault zone inside the basinal depression, whereas the vertical subsidence is accommodated by a belt of large normal faults that forms the basin margins.
		Joints were studied in 35 stations in which they were mapped at scale of 1:10 or measured along scanlines.
	earth.es.huji.ac.il /reches/research.html (1661 words)

	Ej Guide: Expansion Joint Design and Installation
		The expansion joint manufacturer shall be required to furnish, on request, a copy of their Quality Assurance Manual.
		No movement of the expansion joint - compression, extension, offset, rotation and especially torsion - due to piping misalignment, for example, shall be imposed which has not been anticipated and designed into the movement capability of the expansion joint.
		After the anchors or other fixed points are in place and the piping is properly supported and guided, the expansion joint shipping devices should normally be removed in order to allow the expansion joint to compensate for changes in ambient temperature during the remainder for the construction phase.
	www.usbellows.com /ejguide/safety/installation.htm (415 words)

	Slip Free Systems-For your commercial flooring needs.
		Slip Free Systems has a proven method to stop the transmission of moisture in your concrete slab or surface.
		Slip-Resistant surfaces are used to increase the coefficient of friction on the upper surface of the polymer overlay for pedestrian and vehicular use.
		Slip Free Systems Floors are not slippery when maintained in a clean and dry condition as recommended.
	www.slipfreesystems.com /guide.htm (1189 words)

	Project Chevy Tahoe: New Drive Shafts for your Chevy 4x4 - Six States Drivelines - Chevy/GM at Off-Road.com (Site not responding. Last check: 2007-10-29)
		The front drive shaft is not as critical as it is generally only spinning when in 4wd and this generally occurs at slower speeds.
		The double cardan CV joint is much better at eliminating vibrations in your Drive shaft This will allow the Drive shaft to run much smoother and put less stress on all of the driveline components The downside is that the double cardan joint is much more expensive.
		With a double cardan joint on one end it is much easier to achieve proper geometry as you want 0 angle on the pinion side and the pinion shaft should be inline with the slope of the Drive shaft That said you need to remember that those angles are the operating angles.
	www.off-road.com /chevy/projects/kickin/drivelines (803 words)

	Wayne Rodericks Teton Short Line, Double Slip Switch at Malfunction Junction. An HO Scale Model Railroad featuring ... (Site not responding. Last check: 2007-10-29)
		At the heart of Malfunction Junction (MFJ) lies a piece of trackwork in HO scale, built with code 70 rail that had to be rebuilt twice over to attain the reliability needed.
		The.015" spider legs are connected to the points simply be bending the end down 90 degrees (do spiders have feet?- ours walk on their tippy toes) and dropping into the hole of a tab made from.005" brass sheet and soldered under the base of the rail.
		A short length of 1/16" brass tube is slipped on and soldered to the rotating rod to restrict vertical motion.
	www.ida.net /users/tetonsl/railroad/dblslip.htm (1605 words)

	PT&P: On-Line Tour: Expansion Joints-Slip Type
		Slip-type expansion joints are made by "telescoping" one pipe within another and sealing them together with packing, which will take the temperature and pressure while allowing large movement in the axial direction.
		If the joint is subjected to forces perpendicular to the pipe, the design is more critical.
		The photo to the right shows a prototype unit being tested in a load cell to determine the force required to move the joint in the axial direction (down) when another perpendicular force is being applied.
	www.pipingtech.com /tour/expjt-sliptype.htm (158 words)

	Joint Sets (Site not responding. Last check: 2007-10-29)
		In keyblocks the stereo net diagram is used to identify joint pyramids (JP's) of all removable blocks.
		The method uses information on average joint spacing and orientations to compute the probability of 3 joints intersecting to form a block corner.
		You can also look through the list of unstable blocks and determine which joints the blocks are most frequently sliding on and which planes most frequently form the release plane.
	www.pantechnica.com /resources/newsletters/2002/august/JointSets.htm (349 words)

	Hand-to-Hand Combat Actions
		When a critical strike occurs, the Body Flip / Throw attack inflicts triple the rolled damage and double the damage bonus that would be applied to a normal Body Flip / Throw.
		If the victim attempts to is able establish a Joint Lock on the attacker, they suffer a -5 penalty to their roll, but if their result is greater than 4, then the attacker's only option to avoid the Joint Lock is to stop the Crush / Squeeze attack.
		Joint Locks do no damage unless the victim attempts to break free, but neither the victim nor the attacker can perform any other physical action while the joint lock continues unless otherwise stated, although psionic powers can still be used without penalty.
	homepage.mac.com /cheethorne/Palladium/hthcombatactions.htm (7776 words)

	Uncoated Weathering Steel in Structures (T 5140.22)
		Consider the use of a trough under the deck joint to divert water away from vulnerable elements.
		Therefore, when joints are necessary, the assumptionshould be that the joints will leak and that drainage will contact the steel.
		Therefore, the contact surfaces of overlapping joints must be protected from intrusion of rainfall and runoff.
	www.fhwa.dot.gov /legsregs/directives/techadvs/t514022.htm (3001 words)

	GLOSSARY OF JOIST AND STRUCTURAL TERMS
		A principle use for a plug weld is to transmit shear in a lap joint.
		A bolted joint in which the slip resistance of the connection is required.
		A flat ring of metal with a hole in the middle used to give thickness to a joint or to distribute pressure under the head of a nut or bolt.
	www.hancockjoist.com /glossary.htm (12988 words)

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