BS MA 25:1973

Foreword
1. General
1.1 Scope
1.2 Definitions
1.3 Conformity with law or regulation
2. Materials
2.1 General
2.2 Schedule of materials
3. Glasses for ships' windows
3.1 General
3.2 Dimensions of toughened safety glasses
3.3 Examination and testing of toughened glasses
3.4 Marking
4. Dimensions and tolerances for ships' windows
5. Design and construction
5.1 General
5.2 Windows for sea-going ships
5.3 Windows for ships in sheltered or inland waters
5.4 Hinge pins and window fasteners
6. Glazing
6.1 General
6.2 Wheelhouse windows
6.3 Glazing strips, glazing screws and fixing bolts
7. Installation and testing
7.1 Installation
7.2 Testing
7.3 Inspection
7.4 Testing facilities
8. Identification
APPENDICES
A. Examination of toughened safety glass using
      polarized light
B. Suitable apparatus for load stamp test of toughened
      safety glass
C. Timber for ships' window frames
D. Windows for ships operating in sheltered waters
E. Alternative method for calculating the thickness
      of toughened safety glass using design pressure
      head formulae
TABLES
1. Thickness of toughened safety glass for standard
      sizes of ships' windows
2. Tolerances on thickness of glass
3. Tolerance on flatness and parallelism of glass
4. Dimensions of arris for edge of glasses
5. Proof loading for load stamp test
6. Dimensions of ships' windows
7. Dimensions and number of window hinge pins and
      fasteners
8. Glazing dimensions for wheelhouse windows
9. Dimensions for glazing strips, glazing screws and
      fixing bolts
10. Maximum allowable pressure head on toughened safety
      glass for standard sizes of ships' windows listed
      in Table 1
FIGURES
1. Edge of the glass
2. Rectangular windows
3. Category 1 and Category 2 windows
4. Profile showing tiers, datum deck and weather deck
5. Polariscope for examining for standard of
      toughening of glass
6. Apparatus for load stamp test of toughened glass
7. Curve for determination of factor beta based on
      window size ratio