Recommendations on basic workmanship. Common Arrangement of Work Sections (CAWS) classification M20 and M30. Cross References: BS 4471*BS 5262*BS 5268:Part 3*BS 5385:Part 1*BS 5385:Part 2*BS 5385:Part 4*BS 5492*BS 8000:Part 1*BS 8000:Part 2:Section 2.1*BS 8000:Part 2:Section 2.2*BS 8000:Part 3*BS 8000:Part 4*BS 8000:Part 5*BS 8000:Part 6*BS 8000:Part 7*S 8000:Part 8*BS 8000:Part 9*BS 8000:Part 11:Section 11.1*BS 8000:Part 11:Section 11.2*BS 8000:Part 12*BS 8000:Part 13*BS 8000:Part 14 *BS 8000:Part 15*BS 6100:Part 1:Section 1.3:Subsection 1.3.1*BS 6100:Part 1:Section 1.3:Subsection 1.3.3*