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Lecture

The document outlines the calculations for the required lengths and quantities of materials for two options based on different spans. Option 1 results in a total weight of 144.378 kg, while Option 2 is more economical at 138.825 kg. The total cost, including contingencies and mark-up, amounts to ₱16870.014.

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8 views3 pages

Lecture

The document outlines the calculations for the required lengths and quantities of materials for two options based on different spans. Option 1 results in a total weight of 144.378 kg, while Option 2 is more economical at 138.825 kg. The total cost, including contingencies and mark-up, amounts to ₱16870.014.

Uploaded by

hasleymrivera
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Solution: (note: for lap length, use 40db)

Parallel to 8m span:

Cut length:

8 – 2(0.075) = 7.85 m (straight)

Hook: use 16db

16(10) = 160 mm or 0.16 m

Use 6.0 m commercial length:

7.85 – 5.84 = 2.01 + 40(0.010) = 2.41 m (remaining)

Including hook:

2.41 + 0.16 = 2.57m

Quantity: (option 1)

10/0.4 = 25 + 1 = 26 pcs

26 pcs – 10 mm Ø x 6.0 m

Using 6.0 m: 2 pcs x 2.57m

26/2 = 13 pcs – 10 mm Ø x 6.0 m

Option 2:

Left side: 7.5m

26 pcs – 10 mm Ø x 7.5m
Right side: 1.07m

For 6 m: 5.61

For 7.5 m: 7.01 (less wastage)

7 pcs x 1.07m per 7.5m commercial length

26/7 = 4 pcs – 10 mm Ø x 7.5m

Summary: Convert to kilograms

Option 1:

26 pcs – 10 mm Ø x 6.0 m = 26(6)(0.617) = 96.252 kg

13 pcs – 10 mm Ø x 6.0 m = 13(6)(0.617) = 48.126 kg

Total = 144.378 kg

Option 2:

26 pcs – 10 mm Ø x 7.5m = 120.315 kg

4 pcs – 10 mm Ø x 7.5m = 18.51 kg

Total: = 138.825 kg

Option 2 governs!

Total: 138.825 kg

Parallel to 10 m span:

Qty: 8/.4 = 20 + 1 = 21 pcs

Option 1:

21 pcs – 10mm Ø x 6.0m

21 pcs - 10mm Ø x 4.57m

21/1 = 21 pcs - 10mm Ø x 6m

Option 2:

21 pcs – 10mm Ø x 7.5m

21 pcs - 10mm Ø x 3.07m

Use 7.5m: (2 pcs x 3.07m)

21/2 = 10.5 say 11 pcs - 10mm Ø x 7.5m


Summary:

Option 1:

42 pcs – 10 mm dia. x 6.0m = 155.484 kg

Option 2:

32 pcs – 10 mm dia. x 7.5m = 148.08 kg (Economical!)

Total cost: (40/kg)

138.825 + 148.08 = 286.905kg (₱40/kg)

=₱11476.20(1.05) = ₱12050.01 (with contingency)

₱12050.01(1.40) = ₱16870.014 (with contingency and mark-up)

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