1. **State the problem:** We need to prepare a taking off list for earthwork and excavation trench for a ground beam with a maximum depth of 1.00m, starting from formation level, including deposit of excavated material on site. 2. **Identify key parameters:** - Maximum excavation depth $d = 1.00$ m - Beam dimensions vary (e.g., 150 x 450 mm, 200 x 750 mm, etc.) from the beam schedule. - Length of each beam span $L$ (assumed or provided from site drawings). 3. **Calculate volume of excavation for each beam:** The volume $V$ of excavation for a beam trench is approximated by: $$V = L \times W \times d$$ where: - $L$ = length of the beam trench (m) - $W$ = width of the trench (m), typically slightly larger than beam width for working space - $d$ = depth of excavation (m), here $1.00$ 4. **Determine trench width $W$:** Assuming trench width $W$ is beam width plus clearance, e.g., beam width $b$ plus 0.3 m clearance: $$W = b + 0.3$$ For example, for beam size 150 mm (0.15 m): $$W = 0.15 + 0.3 = 0.45\,m$$ 5. **Calculate excavation volume for each beam:** Example for beam GH1 (150 x 450 mm): - Beam width $b = 0.15$ m - Trench width $W = 0.45$ m - Depth $d = 1.00$ m - Length $L$ (assumed, e.g., 6 m) Then: $$V = 6 \times 0.45 \times 1.00 = 2.7\,m^3$$ 6. **Repeat for all beams:** Calculate $V$ for each beam using their respective widths and lengths. 7. **Summarize taking off list:** Create a table listing each beam mark, trench length, trench width, depth, and calculated excavation volume. 8. **Include spoil heap volume:** Total excavated volume equals total spoil heap volume on site. **Final note:** To complete the taking off list, you need the exact lengths of each beam trench from site drawings or specifications. Use the formula above to calculate excavation volumes for all beams.