
Concept explainers
List and explain the two fundamental types of competitively bid construction contracts.
Find the contract type that is mainly used for the construction of piers for supporting large suspension bridge and provide reason for the same.

Explanation of Solution
The two fundamental types of competitive bid construction contract are as follows:
1. Lump sum contract:
In this contract, a proprietor agrees to provide a fixed lump sum amount of money to the contractor for the complete execution of project.
The owner will know about the entire project cost only during the commencement of the project.
This contract type is used in small projects where the scope and responsibility of the owner and contractor are well defined.
2. Unit price contract:
This type of contract depends on the estimation of quantities of items involved in a project and their corresponding unit prices.
The contractor’s overhead and profit are incorporated in the unit price.
The resources involved in the construction project are recognized, but the total quantity of work involved in the project is unknown at the time of contract.
The unit price contract is mainly used for the construction of piers for supporting suspension bridge, as the bridge is supported by multiple units of similar piers and unit price contracts provide flexibility to the contractor to fix the price of unit pier and execute repeated work.
Want to see more full solutions like this?
- For the beam shown, where should a uniformly distributed downward live load, wl, be placed to cause the maximum upward reaction at support A? (D, E, and F are the supports, from left to right, to the right of C.) B C a. From A to B and D to E b. From A to D and E to F c. From B to D and E to F ☑ d. From B to C and D to E L Larrow_forwardQuestion 1 1. A solid shaft of 1.55 m is used as a tractor propeller (prop) shaft. The shaft twists through 1.8 while rotating at 900 rpm. The diameter of the shaft is 60 mm and the modulus of rigidity is 85 GPa. Calculate 1.1 The maximum shear stress in the shaft 1.2 The power transmitted by the shaft. 2. The tractor has undergone minor modifications to increase the transmitted power by 20%. The solid shaft is replaced by a lighter hollow shaft of the same material, with a dimeter ratio of 2:1. Calculate the suitable dimeters of the hollow shaft.arrow_forwardUse Area Moment Method of Beam Deflectionsarrow_forward
- Determine rotations at all the nodes of the beam and reactions at the supports. Assume support 1 and 3 are roller and support 2 is pinned, L1=1.25m, L2=3.75m and w=60kN/m. Please show all working and FBD's where relevant.arrow_forwardspecific gravity of the soil is 1.41 percentage of water content by weight at field capacity and wilting point are 15% and 7% respectively calculate the equivalent moisture content as equivalent depth for 1.2m root zone: A. At permanent wilting point B. At field capacity C. For ready available water Ex 4-3: If the crop consumptive use in Ex(4-2) is 18 m³/donum/day,calculate: A. Irrigation interval in days B. Field water duty assuming 40% losses during irrigation C. Amount of added water to irrigate one donum. n: CFc- IWC) * As *D Lg dn - Q.te A date. A d9 Q IWC- 20% FC-271 Qg-40e D=100cm sec area of the field. Ed=65% 1 hectare As 1.3arrow_forward۰۹:۲۵ ZV9 HW2-C.pdf Dept: Civil Eng. Kerbala HW2 3rd Year (C) Ex 4-1: The field capacity and wilting point as depth equivalent of soil are 178mm and 102 mm respectively. PAD-60% Calculate the irrigation interval if the water consumptive use is 4.5 mm/day. Ex 4-2: The specific gravity of the soil is 1.41 percentage of water content by weight at field capacity and wilting point are 15% and 7% respectively. a) calculate the equivalent depth of moisture content for 1.2m root zone and PAD 70% at permanent wilting point, at field capacity and for readily available water b) If the crop consumptive use is 18 m/donum/day, calculate: Irrigation interval in days, field water duty assuming 40% losses during irrigation and amount of added water to irrigate one hectare. Ex4-3: Using Blaney-Criddle formula, calculate the irrigation interval through specific interval of plant growth according to the following data: . Mean air temperature 25 C percentage of day light hour through the month 8.4% Crop…arrow_forward
- Determine the global stiffness matrix of the beam shown in Fig. 3. Assume supports at 1 and 3 are rollers and the support at 2 is a pinned support. Indicate the degrees of freedom in all the stiffness matrices. EI is constant, w=60kN/m, L1=1.25m and L2=3.75m please explain how the code numbers for global matrix are determined in detailarrow_forwardFor the truss shown in Fig 2, determine the nodal displacement and member forces for all elements of the truss. Assume for each member A = 0.0015 m2 and E = 200 GPa please show all working, relevant FBD's and use ID's indicated in the diagram, if using an alpha numerical in equations please indicate where it is being applied to in the truss.arrow_forwardDetermine the global stiffness matrix of the beam shown in Fig. 3. Assume supports at 1 and 3 are rollers and the support at 2 is a pinned support. Indicate the degrees of freedom in all the stiffness matrices. EI is constant, w=60kN/m, L1=1.25m and L2=3.45m please explain how the code numbers for global matrix are determined in detailarrow_forward
- Fundamentals Of Construction EstimatingCivil EngineeringISBN:9781337399395Author:Pratt, David J.Publisher:Cengage,Construction Materials, Methods and Techniques (M...Civil EngineeringISBN:9781305086272Author:William P. Spence, Eva KultermannPublisher:Cengage LearningArchitectural Drafting and Design (MindTap Course...Civil EngineeringISBN:9781285165738Author:Alan Jefferis, David A. Madsen, David P. MadsenPublisher:Cengage Learning
- Residential Construction Academy: House Wiring (M...Civil EngineeringISBN:9781285852225Author:Gregory W FletcherPublisher:Cengage LearningTraffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning




