Concrete Formwork Svstems - Part 5

Selection Criteria for Horizontal Formwork System - Chương này cung cấp một bản tóm tắt của các yếu tố ảnh hưởng đến việc lựa chọn thích hợp của hệ thống ván khuôn theo chiều ngang. Chương này cũng trình bày một phân tích bảng so sánh của việc sử dụng và hạn chế của từng hệ thống ván khuôn được trình bày trong chương 3 và 4. Một ví dụ về một vấn đề lựa chọn ván khuôn cũng được cung cấp để giải thích làm thế nào các bảng có thể được sử dụng để chọn chính xác hệ. | 5 Selection Criteria for Horizontal Formwork System Factors Affecting Horizontal Formwork Selection Choosing the Proper Formwork System Using Tables Copyright Marcel Dekker Inc. All rights reserved. This chapter provides a summary of the factors affecting the proper selection of horizontal formwork system. This chapter also presents a tabular comparative analysis of usage and limitations of each of the formwork systems presented in Chapters 3 and 4. An example of a formwork selection problem is also provided to explain how these tables can be used to accurately select the optimum formwork system for the job. FACTORS AFFECTING HORIZONTAL FORMWORK SELECTION Selecting the formwork system for cast-in-place reinforced concrete slabs is a critical decision that can affect cost safety quality and speed of construction. Many factors must be considered for the proper selection of the formwork system. Among these are 1. Factors related to building architectural and structural design which include slab type and building shape and size 2. Factors related to project job specification and schedule which includes the speed of construction 3. Factors related to local conditions which include area practices weather conditions and site characteristics 4. Factors related to the supporting organizations which include available capital hoisting equipment home-office support and availability of local or regional yard supporting facilities Copyright Marcel Dekker Inc. All rights reserved. An overview of all the factors affecting the selection of formwork systems is shown in Figure . The following sections briefly define the terminology and explain how these factors affect the selection of the horizontal formwork system. Building Design Slab Type The construction cost of slabs is often more than half the cost of structural framing systems except in extremely tall buildings. Therefore selection of the slab formwork system deserves considerable attention to minimize .