SUPERINTENDENCE AND INSPECTION The Florida East Coast Railway, which built the famous viaduct of concrete arches along the Florida Keys, to which reference has already been made, issues the following instruc tions to its inspectors on concrete work: Inspectors will be required to become familiar with, and carefully follow out, the following instructions re garding inspection, and see that the work is carried out in strict accordance with same. An inspector will be required to be on the work during the setting of forms, placing of reinforcement, and the mixing and placing of concrete. He will represent the Engineer-in-Charge, and will be held responsible for the correct performance of the work assigned to him. He will, in a general way, carefully and continuously watch the progress of the work, making a record of the amount of work done each day and the manner in which it is done.
He will be required to become thoroughly familiar with the plans of the work which he is inspecting, that he may intelligently perform the duties intrusted to him. He will be required to fill in a daily report sheet, printed forms being furnished for this purpose, giving the loca tion of the work, the amount of work done, the number of batches mixed and placed, the proportions used, the arrival of material, and all such other information as will assist in making a concise and accurate record of the progress and cost of the whole or any part of the work.
He will see that the following specific instructions are carried out : Forms. That the forms are properly set up and braced.
That the concrete face of the forms are given a coat of oil, applied with a brush.
That an excess of oil is not used.
That the forms are cleaned at each setting and re coated with oil.
That the forms are correctly placed, allowing the depth, width, and batter called for on the plans.
That the inside of the forms is free from debris (shav ings, sawdust, blocks of wood, etc.) just previous to pour ing.
That the forms are properly held together with No. 9
wire or rods of suitable dimensions, and temporary spac ing pieces are used and removed when the concrete reaches their height.
That the joints formed by the edges of the lagging are tight, so that grout will not escape, and that such de fects are remedied by the use of Plaster of Paris, calking, strips of wood, or other suitable approved method.
That the arch centers are lowered sufficiently to allow the arch-ring to assume its permanent set before spandrel walls are poured, in this manner reducing the possibili ties of cracks occurring in spandrel walls, because of possible excessive settlement in crown of arch-ring.
Steel Reinforcement. That the correct number and size of reinforcing bars are used, and that they are placed as shown on plan.
That all steel used is free from loose or scaly rust. (A thin film of rust will not cause the rejection of a bar.) That bars covered with loose, scaly rust are cleaned with a stiff wire brush, or given a pickling bath of a sulphuric acid solution (consisting of 1 part acid to 6 parts of waterj and dipped in clean water.
That the intersections of the rods are wound with a length of No. 18 wire in a sufficient number of places so that the whole steel reinforcement will be fabricated sufficiently strong and rigid to withstand the placing of concrete about the steel and without disturbing the posi tion of same.
That the bars are spaced the proper distance apart and away from the face of the form work, and are secured properly and held in that position in such a manner that they will not be disturbed by the placing of concrete.
That all protruding bars from piers and arches to which other bars are to be spliced and which will be ex posed to the action of the weather for an indefinite period are protected from rusting by a coat of thin, neat cement grout.
That the position of the steel is not disturbed during pouring.
Placing Concrete. The inspector will see that the specified proportions of material are used in mixing the concrete.