1、 GUIDE FOR BUILDING AND CLASSING YACHTS 2016 NOTICE NO. 2 OCTOBER 2016 The following Rule Changes were approved by the ABS Rules Committee on 29 September 2016 and become EFFECTIVE AS OF 1 October 2016. (See http:/www.eagle.org for the consolidated version of the Guide for Building and Classing Yach
2、ts 2016, with all Notices and Corrigenda incorporated.) Notes - The date in the parentheses means the date that the Rule becomes effective for new construction based on the contract date for construction, unless otherwise noted. (See 1-1-4/3.3 of the ABS Rules for Conditions of Classification (Part
3、1).) PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 2 HULL STRUCTURES AND ARRANGEMENTS SECTION 2 DESIGN PRESSURES 1 Displacement Motor Yachts (Paragraph 3-2-2/1.5, as follows:) 1.5 Design Heads for Superstructures and Deckhouses (1 October 2016) The design heads are to be not less than 1.5 m (4.92 f
4、t) nor given by the following equation and requirements: h = ak(bf) yc m (ft) In addition to the above, h at the locations shown below is not to be less than that indicated in the table: Location Values of h meters feet Unprotected Fronts on the Lowest Tier 0.01L + 2.5 0.01L + 8.2 All Other Location
5、s on Lowest Tier and Second Tier 0.005L + 1.25 0.005L + 4.1 All Other Locations, Third Tier and Above 1.5 4.92 where a = factor relating to bulkhead location and yacht length, given in 3-2-2/Table 2 k = service factor = 1.0 for Yachting Service, Commercial Yachting Service = 0.85 for restricted yach
6、ting service notation R (see 1-1-3/1.3) b = factor based on longitudinal location, given in 3-2-2/Table 3 f = factor based on yacht length, given in 3-2-2/Table 4 ABSGUIDE FOR BUILDING AND CLASSING YACHTS .2016 1 Notice No. 2 October 2016 y = vertical distance, in m (ft), from the design waterline o
7、r load waterline, to the midpoint of the stiffener or panel c = 1.0 for superstructures = 0.85 for deckhouses x = distance, in m (ft), between the after perpendicular and the bulkhead being considered. Deckhouse side bulkheads are to be divided into equal parts not exceeding 0.10L in length, and x i
8、s to be measured from the after perpendicular to the center of each part considered. (Revise second row of 3-2-2/Table 5, as follows:) TABLE 5 Motor Yacht Design Significant Wave Heights, h1/3 (1 October 2016) Notation Operational Design Condition h1/3 Maximum Design Condition (1)h1/3 Yachting Servi
9、ce and Commercial Yachting Service 4.0 m (13.1 ft) 6 m (19.7 ft) Restricted Yachting Service(2)3.5 m (11.5 ft) 4.5 m (14.8 ft) 3 Semi-Planing and Planing Motor Yachts 3.5 Side and Transom Design Pressure Monohulls (1 October 2016) (Revise Subparagraph 3-2-2/3.5.1, as follows:) 3.5.1 Side Slamming Pr
10、essure DcgsxxxwwsxxFnBLNP+=707011kN/m2(tf/m2, psi) (Revise definition of Psxx, as follows:) Psxx= side design slamming pressure at any section clear of LCG, in kN/m2(tf/m2, psi). The side design slamming pressure applies both along the entire length below L/12 above baseline and to the region forwar
11、d of 0.125L. (Remainder of Paragraph 3-2-2/3.5 is unchamged.) (Revise 3-2-2/Table 6, as follows:) TABLE 6 Deck Design Pressures, Pd (1 October 2016) Location kN/m2tf/m2psi Main Weather Deck 0.20L + 4.5 0.02L + 0.46 0.0088L + 0.66 Superstructure and deckhouse decks forward of 0.25L Superstructure and
12、 deckhouse decks elsewhere Internal decks (included in hull-girder section modulus) 0.10L + 4.5 0.01L + 0.46 0.0044L + 0.66 Internal accommodation only decks (not included in hull-girder section modulus.) 3.4 0.35 0.5 2 ABSGUIDE FOR BUILDING AND CLASSING YACHTS .2016 Notice No. 2 October 2016 ABSGUI
13、DE FOR BUILDING AND CLASSING YACHTS .2016 3 PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 2 HULL STRUCTURES AND ARRANGEMENTS SECTION 3 DISPLACEMENT YACHTS 3 Aluminum and Steel 3.3 Plating Thickness 3.3.4 Strength Deck and Bottom Shell within 0.66L Amidships, L 30.5 m (100 ft) (1 October 2016) (Revi
14、se definitions of “q” and “y”, as follows:) q = 235/y(24/y, 34,000/y) y= for steel, minimum yield strength, in N/mm2(kgf/mm2, psi) = for aluminum, minimum yield strength, welded condition in N/mm2(kgf/mm2, psi) for formulas given in 3-2-3/3.3.1 and 3-2-3/3.3.2 = for aluminum, minimum yield strength,
15、 unwelded condition in N/mm2(kgf/mm2, psi) for formulas given in 3-2-3/3.3.3 and 3-2-3/3.3.4 (Revise Subparagraph 3-2-3/3.3.5, as follows:) 3.3.5 Minimum Thickness (1 October 2016) After all other requirements are met, the thickness is in general not to be less than the following: Steel Vessels: 5.0
16、 mm (0.196 in.) for bottom shell 4.0 mm (0.157 in.) for side shell 4.0 mm (0.157 in.) for strength decks 3.0 mm (0.118 in.) for internal decks 3.0 mm (0.118 in.) exposed deckhouse/superstructure bulkheads 3.0 mm (0.118 in.) for all other locations Aluminum Vessels: 6.0 mm (0.236 in.) for bottom shel
17、l 5.0 mm (0.196 in.) for side shell 5.0 mm (0.196 in.) for exposed strength decks 4.0 mm (0.157 in.) for enclosed strength and internal decks 4.0 mm (0.157 in.) exposed deckhouse/superstructure bulkheads 4.0 mm (0.157 in.) for all other locations 3.5 Internals General 3.5.1 Strength (1 October 2016)
18、 (Revise definitions of “q” and “y”, as follows:) y= minimum yield strength, in N/mm2(kgf/mm2, psi). For aluminum alloys, it is in general for the as-welded condition for strength deck and shell structure and unwelded condition for other structures q = 235/y(24/y, 34,000/y) Notice No. 2 October 2016
19、 4 ABSGUIDE FOR BUILDING AND CLASSING YACHTS .2016 PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 2 HULL STRUCTURES AND ARRANGEMENTS SECTION 4 PLANING AND SEMI-PLANING YACHTS 3 Aluminum or Steel 3.3 Plating Thickness (Revise Subparagraph 3-2-4/3.3.1, as follows:) 3.3.1 All Plating, Lateral Loading (
20、1 October 2016) t = sakpk1mm (in.) where s = spacing, in mm (in.), of the shell, deck, superstructure, deckhouse or bulkhead longitudinals or stiffeners. p = design pressure, in kN/m2(tf/m2, psi), given in 3-2-2/3 k = plate panel aspect ratio factor, given in 3-2-4/Table 1 k1= 1000 (1) for t in mm (
21、in.) a= design stress, in N/mm2(kgf/mm2, psi), given in 3-2-4/Table 2 (Revise 3-2-4/Table 2, as follows:) TABLE 2 Design Stress, a, Aluminum and Steel Plating (1 October 2016) Location Design Stress, a(1)SteelAluminum Bottom Shell Slamming Pressure 0.90y(2)0.90y(2)Hydrostatic Pressure 0.55y 0.55y Wa
22、ter Jet Tunnels Slamming Pressure 0.60y 0.60y Hydrostatic Pressure 0.55y 0.55y Side Shell Above and below Freeboard Deck Slamming Pressure 0.90y 0.90y Hydrostatic Pressure 0.55y 0.55y Deck Plating Strength Deck 0.60y 0.65y Lower Decks/Other Decks 0.60y 0.65y Wet Decks 0.90y 0.90y Superstructure and
23、Deckhouse Decks 0.60y 0.65y Bulkheads Deep Tank 0.60y 0.65y Watertight 1.00y 1.00y Superstructure 245/ys, (25/ys, 34000/ys) for higher strength steels, but not to be taken less than 0.72 ys= yield strength for higher strength steel, in N/mm2(kgf/mm2, psi) qa= 115/ya, (12/ya, 17000/ya) for aluminum a
24、lloys. ya= minimum unwelded yield strength for aluminum alloys, in N/mm2(kgf/mm2, psi), but not to be taken as more than 0.7 of the ultimate tensile strength in the as-welded condition tsand talare as defined in 3-2-4/3.3.2. However, tsand talis not to be taken less than that given in 3-2-4/3.3.3v)
25、below. ii) Side Shell ts= 0.40sLq + 2.0 mm ts= 0.009sLq + 0.08 in. tal= 0.62aLq + 1.0 mm tal= 0.013aLq + 0.04 in. where tsand talare as defined in 3-2-4/3.3.2 and qs, qaand L are as defined in 3-2-4/3.3.3. However, tsand talis not to be taken less than that given in 3-2-4/3.3.3v) below. iii) Strengt
26、h Deck ts= 0.40sLq + 1.0 mm ts= 0.009sLq + 0.04 in. tal= 0.62aLq + 1.0 mm tal= 0.013aLq + 0.04 in. where tsand talare as defined in 3-2-4/3.3.2 and qs, qaand L are as defined in 3-2-4/3.3.3. However, tsand talis not to be taken less than that given in 3-2-4/3.3.3v) below. iv) Lower Decks, W.T. Bulkh
27、eads, Deep Tank Bulkheads ts= 0.35sLq + 1.0 mm ts= 0.007sLq + 0.04 in. tal= 0.52aLq + 1.0 mm tal= 0.011aLq + 0.04 in. where tsand talare as defined in 3-2-4/3.3.2 and qs, qaand L are as defined in 3-2-4/3.3.3. ABSGUIDE FOR BUILDING AND CLASSING YACHTS .2016 5 Notice No. 2 October 2016 v) After all o
28、ther requirements are met the thickness is in general not to be less than the following: Steel Vessels: 5.0 mm (0.196 in.) for bottom shell 4.0 mm (0.157 in.) for side shell 4.0 mm (0.157 in.) for strength decks 3.0 mm (0.118 in.) for internal decks 3.0 mm (0.118 in.) exposed deckhouse/superstructur
29、e bulkheads 3.0 mm (0.118 in.) for all other locations Aluminum Vessels: 6.0 mm (0.236 in.) for bottom shell 5.0 mm (0.196 in.) for side shell 5.0 mm (0.196 in.) for exposed strength decks 4.0 mm (0.157 in.) for enclosed strength and internal decks 4.0 mm (0.157 in.) exposed deckhouse/superstructure
30、 bulkheads 4.0 mm (0.157 in.) for all other locations Where the use is made of special purpose aluminum extrusions or special welding techniques are utilized the minimum plate thickness, as given in 3-2-4/3.3.3 above, will be specially considered based on location, purpose and material grades. 3.3.4
31、 Water Jet Tunnels and Transverse Thruster Tubes (Revise Item 3-2-4/3.3.4(b), as follows:) 3.3.4(b) Transverse Thruster Tunnels (1 October 2016). The thickness of the tunnel plating for the transverse thrusters is to be not less than the required thickness for the adjacent shell plating as calculate
32、d in accordance with 3-2-4/3.3.1, nor the following equation: t = 0.008d Q + 3.0 mm t = 0.008d Q + 0.12 in. where d = inside diameter of the tunnel, in mm (in.), but is taken as not less than 968 mm (38 in.) Q is as given in 3-2-1/1.1.1. 6 ABSGUIDE FOR BUILDING AND CLASSING YACHTS .2016 Notice No. 2
33、 October 2016 (Revise 3-2-4/Table 3, as follows:) TABLE 3 Design Stress, a, Steel, Aluminum and FRP Internals (1 October 2016) Location Steel Aluminum FRP Bottom Longitudinals Slamming Pressure 0.65y 0.70y 0.33u Bottom Longitudinals Sea Pressure 0.50y 0.50y 0.40u Side Longitudinals Slamming Pressure
34、 0.60y 0.70y 0.40u Side Longitudinals Sea Pressure 0.50y 0.50y 0.40u Deck Longitudinals Strength Decks 0.50y 0.70y 0.40u Deck Longitudinals Other Decks 0.50y 0.70y 0.40u Wet Deck Longitudinals 0.75y 0.75y 0.40y Bottom Transverse and Girders Slamming Pressure 0.80y 0.80y 0.33u Bottom Transverses and
35、Girders Sea Pressure 0.60y 0.70y 0.33u Side Transverses and Girders Slamming Pressure 0.80y 0.80y 0.33u Side Transverses and Girders Sea Pressure 0.60y 0.70y 0.33u Deck Transverses and Girders Strength Deck 0.75y 0.90y 0.33u Deck Transverses and Girders Other Decks 0.75y 0.90y 0.33u Wet Deck Transve
36、rses and Girders 0.75y 0.90y 0.33y Watertight Bulkheads 1.00y 1.00y 0.50u Tank Bulkheads 0.60y 0.77y 0.33u Superstructure and Deckhouse (Front, Sides, Ends and Tops) 0.70y 0.90y 0.33u Foundations 0.60y 0.60y 0.33u y = minimum yield strength, in N/mm2(kgf/mm2, psi). For aluminum, minimum yield streng
37、th, welded condition in N/mm2, (kgf/mm2, psi); except for sniped face watertight bulkhead stiffeners, for which the minimum yield strength, unwelded condition, is to be used. u = ultimate tensile strength in N/mm2(kgf/mm2, psi). For aluminum, minimum ultimate strength, welded condition in N/mm2, (kg
38、f/mm2, psi) 3.5 Internals 3.5.3 Proportions (Revise Item 3-2-4/3.5.3(a), as follows:) 3.5.3(a) Aluminum (1 October 2016). The web depth to thickness ratio is not to exceed 59 and the outstanding flange width to thickness ratio it to be not more than 12. For flat bar stiffeners the depth to thickness
39、 ratio is in general not to exceed 12. The web depth in general is to be not less than twice the depth of cut-outs in the web. The webs of girders and transverse are to be suitably supported to provide internal stability. (Add new Item 3-2-4/3.5.3(b), as follows:) 3.5.3(b) Steel (1 October 2016). Th
40、e web depth to thickness ratio is not to exceed 70 and the outstanding flange width to thickness ratio is to be not more than 15. For flat bar stiffeners the depth to thickness ratio is in general not to exceed 15. The web depth in general is to be not less than twice the depth of cut-outs in the we
41、b. The webs of girders and transverses are to be suitably supported to provide lateral stability. (Renumber Item 3-2-4/3.5.3(b) as 3-2-4/3.5.3(c).) ABSGUIDE FOR BUILDING AND CLASSING YACHTS .2016 7 Notice No. 2 October 2016 PART 3 HULL CONSTRUCTION AND EQUIPMENT CHAPTER 2 HULL STRUCTURES AND ARRANGE
42、MENTS SECTION 6 HULL STRUCTURAL ARRANGEMENT 1 Structural Arrangement All Materials 1.3 Watertight Bulkheads (Revise Subparagraph 3-2-6/1.3.3, as follows:) 1.3.3 Collision Bulkhead (1 October 2016) Yachts are to be provided with a collision bulkhead fitted not less than 0.05Lfabaft nor, except as spe
43、cially permitted further than 0.08Lfor 0.05Lf+ 3 m (9.84 ft), whichever is greater, from the reference point. The bulkheads are to be intact except for approved pipe penetrations, and are to extend to the main weather deck preferably in one plane. In yachts having long superstructures at the forward
44、 end, the bulkheads are to be extended weathertight to the superstructure deck. Provided the extensions are not less than 0.05L abaft the stem at the design load waterline, they need not be fitted directly over the collision bulkhead. In such cases, the part of the deck forming the step is to be wea
45、thertight. One door or opening with a watertight closing appliance maybe fitted in the collision bulkhead below the freeboard or main weather deck of yachts less than 30.5 m (100 ft) in length. This door or closure is to be kept closed and secured at sea, marked with a sign indicating that it is to
46、remain dogged tight while the yacht is underway and provided with an indicator on the bridge showing whether the door or closure is open or closed. (Revise Subparagraph 3-2-6/1.3.4, as follows:) 1.3.4 Reference Point (1 October 2016) The reference point in determining the location of the collision b
47、ulkhead is the forward end of Lfexcept that in the case of yachts having any part of the underwater body, such as the bulbous bow, extending forward of the forward end of Lf, the required distances are to be measured from a reference point located a distance forward of the forward end of Lf. This di
48、stance, x, is the lesser of the following (see 3-2-6/Figure 1): i) Half the distance between the forward end of Lfand the extreme forward end of the extension, p/2 or ii) 0.015Lfiii) 3 m (9.84 ft) where Lfis as defined in 3-1-1/3.3. In any case, the collision bulkhead is to be abaft of the stem. The
49、 forward end of Lfis to coincide with the fore side of the stem on the waterline at which Lfis measured. 8 ABSGUIDE FOR BUILDING AND CLASSING YACHTS .2016 Notice No. 2 October 2016 (Revise Subparagraph 3-2-6/1.3.6, as follows:) 1.3.6 Chain Locker (1 October 2016) i) For yachts with L over 61 m (200 ft), chain lockers and chain pipes are to be made watertight up to the weather deck. The arrangements are t
