• Joseph Chukwuka Okah
• Ajiboye S. A
• Iyenemi Briggs

Construction drawing serves as a communication medium graphically designed to convey the technical and design information from the drawings to the physical structure. Construction drawings have become necessary because of project complexity and the need for plan approval and contract agreement. However, some developers still build without construction drawings today just to cut cost. This study investigates the Impact of Construction Drawings on Building Projects. To achieve this, a collection of the contract drawings of Polytechnic Port Harcourt Faculty of Engineering Building was done to ascertain their roles in building project. Also, opinions of 61 stakeholders from the public and private sectors of the industry were randomly sampled on the subject matter. The collection was analyzed while simple %, mean score (Ms) and chi-square, χ (for hypothesis test) were used to analyze the survey data. At the end, the study identified Architectural, Structural, Electrical, Mechanical Engineering (Building services) and finishing drawings as basic construction drawings for building project. Findings also showed that construction drawings communicate the intent of professionals in a universal language by providing spatial organization (plan), defining shape, orientation and landscape, displaying sections, detailing of structural members, ensuring stability and easy setting out. They also provide power distribution, lighting and power point details which ensure easy wiring, display water supply, wastewater disposal routes, HVACs installation guides and clear finishes which accurately transfers the design information to the physical building. These impacts were confirmed by the survey result (Ms>2.5). Chi-square test at 5% significant level show that x2sample > x20.95, 1, (18.24 > 3.84) thus accepting H1 that construction drawings have positive impact on building project and rejecting H0. Amongst the recommendations are; punishment of offenders and the imprint of personnel registration numbers and seals on the construction drawings as a pre-requisite for plan permit/approval

Architectural drawing, spatial organization, plan, elevation, section, structural, Electrical, mechanical/Building services, finishing, layout

"The Impact of Construction Drawings on Building Project Execution", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 12, page no.f328-f347, December-2024, Available :http://www.jetir.org/papers/JETIR2412538.pdf

"The Impact of Construction Drawings on Building Project Execution", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 12, page no. ppf328-f347, December-2024, Available at : http://www.jetir.org/papers/JETIR2412538.pdf