Section 2 Structural details

2.1 Detail design improvement

2.1.1 For the purposes of these Guidance Notes, structural locations have been divided into five separate groups, with a series of examples of critical structural areas together with alternative associated detail design improvements.

2.1.2 A summary of the data presented is given in Table 5.2.1 whilst the full details are given in Figure 5.2.1 Chine reinforcement as contained in this Section.

2.1.3 Generally, where alternative structural detail design improvements are provided, the details shown will provide improved fatigue strength.

2.1.4 Where ‘top-hat’ sections are shown, the same requirements apply to plate and other stiffening members sections.

Group	Application	Area	Item	Fig. No.
	High speed craft
1	Sandwich	Chine in way of side shell and bottom shell connection	Chine reinforcement	Figure 5.2.1 Chine reinforcement
		Stem	Stem reinforcement	Figure 5.2.2 Stem reinforcement
		Hull bottom structure	Bulkhead to hull connection	Figure 5.2.3 Bulkhead to hull connection
		Hull bottom structure	Bulkhead to hull connection	Figure 5.2.4 Bulkhead to hull connection
2	Single skin	Hull structure	Spray rails	Figure 5.2.5 Spray rails
		Hull structure	Spray rails	Figure 5.2.6 Spray rails
		Chine in way of side shell and bottom shell connection	Chine reinforcement	Figure 5.2.7 Chine reinforcement
		Hull internal structure	Bulkhead to hull connection	Figure 5.2.8 Bulkhead to hull connection
		Hull internal structure	Bulkhead to hull connection	Figure 5.2.9 Bulkhead to hull connection
	Low speed craft
3	Sandwich	Hull internal structure	Bulkhead to hull connection	Figure 5.2.10 Bulkhead to hull connection
		Hull internal structure	Bulkhead to hull connection	Figure 5.2.11 Bulkhead to hull connection
4	Single skin	Hull bottom structure	Bulkhead to hull connection	Figure 5.2.12 Bulkhead to hull connection
		Hull bottom structure	Bulkhead to hull connection	Figure 5.2.13 Bulkhead to hull connection
5	General Detail	Hull centreline structure	Keel/stem reinforcement and keel stiffening	Figure 5.2.14 Keel/stem reinforcement and keel stiffening
		Hull centreline structure	Keel/stem reinforcement and keel stiffening	Figure 5.2.15 Keel/stem reinforcement and keel stiffening
		Hull structure	Deck to hull connection	Figure 5.2.16 Deck to hull connection
		Hull structure	Transom boundary	Figure 5.2.17 Transom boundary
		Hull structure	Deck to hull connection	Figure 5.2.18 Deck to hull connection
		Hull bottom structure	Limber holes	Figure 5.2.19 Limber holes
		Hull bottom structure	Machinery seating, tapping plates	Figure 5.2.20 Machinery seating, tapping plates
		Hull internal structure	Deep girders and floors	Figure 5.2.21 Deep girders and floors
		Hull internal structure	‘Top-hat’ stiffeners penetrating tank boundaries	Figure 5.2.22 'Top-hat' stiffeners penetrating tank boundaries
		Hull internal structure	Lower deck/tank top to bottom shell connection	Figure 5.2.23 Lower deck/tank top to bottom shell connection
		Hull internal structure	Integral tanks access manholes	Figure 5.2.24 Integral tanks access manholes
		Skeg (open type)	Skeg stiffening and reinforcement	Figure 5.2.25 Skeg stiffening and reinfocement
		Skeg (closed type)	Skeg diaphragm plates and sealing laminate	Figure 5.2.26 Skeg diaphragm plates and sealing laminate
		Deck structure	Well deck, lower/sole deck to hull connection	Figure 5.2.27 Well deck, lower/sole deck to hull connection
		Deck structure	Well deck, lower/sole deck to hull connection	Figure 5.2.28 Well deck, lower/sole deck to hull connection
		Deck	Bulkhead to deck connection	Figure 5.2.29 Bulkhead to deck connection
		Deck	Deckhouse to deck connection	Figure 5.2.30 Deckhouse to deck connection