so as to constitute a folder. The specification may be given a double fold so as to be readily placed in an envelope, and one of the exposed faces should show a printed form suitably filled in. Such a form is given in Fig. 24. SEC. II. EXAMPLES OF SPECIFICATIONS (1) SPECIFICATION FOR A MOLASSES STORAGE TANK The specification given below was for material for a molasses tank to be exported to Cuba. The drawing accompanying it was a complete design, giving thickness of all plates, required rivet-spacing and lap, etc., but was not a detail drawing. It will be noted that an alternate quotation is requested in a different manner than the schedule. calls for; the simplicity of the alternate seemed to warrant the departure from the standard method. The required time of delivery may be left blank when inquiring for prices, the bidders being requested (in the letter of invitation) to state how soon they could make delivery; the time can then be inserted in the specification of record, when placing the order. These specifications refer to the above drawing of the Blank Engineering Co., and are intended to cooperate with same. General Description A Cylindrical Tank, 75 ft. 0 in. diam. X 32 ft. 0 in., high, made of steel The cover shown on the drawing consists of a self-supporting dome; the con- Conditions of Bids Bids are to be for a lump sum for the material complete delivered f.a.s. New The estimated shipping weight must be stated in the bid. Bids are to be submitted in duplicate. If any other construction than that shown is proposed by the bidder, drawings and descriptions completely illustrating the same must be furnished with the bid. Material to be Supplied The material to be supplied by this contractor will consist of the material complete for constructing one (1) tank as shown on the drawing, including rivets for making all connections with an excess of 10 percent, and a liberal quantity of setting-up bolts. Material All plate is to be of the best "Tank" steel, full to gauge and free from flaws, structural steel to be open-hearth medium steel 60/70,000 lb. per inch ultimate strength; castings to be of a good quality of gray iron, true and free from imperfections of any kind. Workmanship To be first-class in every respect. Joints are to be scarfed wherever necessary and rivets spaced close enough to allow all seams to be caulked water-tight. All flanges of pipe-fittings, etc., are to be faced and drilled to make a complete job. Marking All parts of this tank are to bear marks corresponding to those of an erection drawing. These marks are to be made with white paint and also with steel stamping dies. Marks on plates are to be made on both sides, so that a plate will not have to be turned over to ascertain its marks. Shop Painting The plates, after marking, are to be given one coat of boiled linseed oil all over. Inspection This material will be subject to inspection at any time by a representative of the Blank Engineering Co. Any material found defective, or not properly marked, will be liable to rejection. Packing The tank is to be knocked-down for export, but as much of the riveting and shop work as possible is to be done before leaving the works. Small pieces are to be boxed and wired for ocean shipment, boxes numbered and contents given on shipping list. Drawings Furnished As early as possible after receipt of order the contractor will forward to the engineers, two complete sets of shop detail drawings for approval, one of these sets when approved will be returned signed to the contractor and the other will be retained by the engineer for his file; any work not in accordance with the approved drawings may be subject to rejection. The contractor shall be responsible for dimensions and details in working plans, and the approval of the detail plans by the engineer shall not relieve the contractor of this responsibility. Also at time of shipment of material, this contractor shall forward to the engineers, two complete sets of erection drawings on cloth and two sets on paper and any further sets reasonably required. (2) SPECIFICATION FOR A BELT CONVEYOR The specification given below was for material to be exported to Mexico. The accompanying drawing was in the nature of a preliminary design, the principal dimensions were given, but the detail construction depended upon the material offered by the contractor. A slat conveyor was finally adopted, and the gallery, etc., was designed after the receipt from the contractor of his detail and arrangement drawings. Spec. No. 2. BLANK ENGINEERING CO. NEW YORK CITY CONTRACT NO. 151 Oct. 30, 1911. SPECIFICATION FOR A BELT CONVEYOR FROM ALCOHOL WAREHOUSE TO WHARF Drawing No. 2084 These specifications refer to the above drawing of the Blank Engineering Co., and are intended to cooperate with same. Description and Service A belt conveyor 144 ft. 0 in. long. c. to c. of end pulleys, for conveying cases of alcohol from the platform of a wharehouse to a delivering staging on a river bank. Material to be Conveyed.-Cases, made of light wood 20 in. × 10 1/2 in. X 15 in. high, containing two canisters of alcohol, and weighing 77 lb. per case. Capacity.-1,000 cases per hour. Drive. By engine or motor, see drawing for arrangement. General. The general arrangement of the conveyor is shown on the drawing which may be scaled for dimensions not given. Condition of Bids Bids are to be for a lump sum for the material delivered complete f.a.s. New Bids must state estimated shipping weight of the material. Bids are to be accompanied by a detailed specification with sketches, describing the material proposed to be furnished, and giving speed of belt, horse-power required to operate, etc. Material to be Supplied The material to be supplied by this contractor will consist of the special material of the installation complete, including main belt; rollers; carriers with grease cups, etc.; head or driving end complete with main pulley, reduction-gearing, driven pulley, boxes, etc.; tail end complete with take-up; and all bolts and fastenings required to completely erect the above with 10-20 percent excess. This contractor will not supply any part of the gallery framing or covering, nor the loading or unloading platforms, nor the movable chute at discharge end, nor the engine or countershaft, nor any driving belts or chains. Marking Every piece of this work is to be distinctly marked with an erection mark corresponding to that on erection drawing, so that there may be no question about its location in the structure. Also shipping marks are to be given as per instructions in the formal order. Inspection This material shall be subject to inspection at any time by a representative of the Blank Engineering Co. Packing and Shipping All material is to be knocked down for ocean shipment, small pieces to be boxed and wired, boxes numbered and contents given in shipping list. Drawings Furnished Within 2 weeks of date of order, this contractor is to forward to the engineers two sets of drawings showing the arrangement and detail of his machinery, so that drawings for the gallery may be made by the engineers. Also at time of shipment of materials, this contractor shall forward to the engineers one copy on cloth and two copies on paper of an erection drawing for his material. Alternate Quotations (1) Bidders are requested to propose and to submit bids on any other type of conveyor that they may consider better suited for accomplishing the operation outlined above. (2) Bidders are requested to submit the addition in prices for the conveyor in case the same is lengthened to 200 ft. 0 in. and 250 ft. 0 in. respectively. (3) SPECIFICATIONS FOR STEEL MILL BUILDINGS The specifications given in full below were for material for a large steel frame factory building for export. The drawings submitted with the specification gave all principal dimensions, weights of all machinery, floor loads, spacing of beams under machinery, location and size of all windows and doors, etc., but did not give any sizes of shapes unless they were of specially required section. The contractor was therefore at liberty to use his favorite or most economical shapes and details. The drawings were sufficiently complete, so that if strains and sections were added they constituted true strain-sheets, and the prints submitted to the bidders were, in fact, often so used by them. In writing specifications for structural-steel mill buildings, it is very important that every item of the construction be definitely fixed. Unless this is done there is liable to be a wide variation in the prices submitted, with the certainty that the lowest bidder has "skinned" the job as much as he dare and as much as the loosely drawn specifications will permit; such specifications work injustice to reputable contractors, and breed trouble for the owner. Spec. No. 3. Dec. 11, 1912. BLANK ENGINEERING CO. NEW YORK CITY CONTRACT NO. 186 SPECIFICATIONS FOR STEEL BUILDINGS FOR A CANE SUGAR FACTORY Drawings Nos. 2073-D, 2386, 2388 and 2389 These specifications refer to the above drawings of the Blank Engineering Co., and are intended to cooperate with same. General Description The steel frame factory building covered by these specifications consists of seven connecting rooms or houses, a description of which is as follows: (1) A Cane Shed, 30 ft. 0 in. wide x 100 ft. 0 in. long c. to c. of columns X 15 ft. 0 in. to L.C., covered as to roof and partly as to sides with corrugated steel. The sides and one end will be open for a convenient distance from the ground, (2) A Mill Room, 60 ft. 0 in. wide by 96 ft. 0 in. long c. to c. of columns by (4) A Clarification House, 80 ft. 0 in. wide X 112 ft. 0 in. long c. to c. of columns The building is to be arranged for extensions as shown on the drawings. (6) A Lean-to to the Clarification House for an Electric Plant, 20 ft. 0 in. wide (6) A Boiling House, 50 ft. 0 in. wide × 88 ft. 0 in. long c. to c. of columns X 64 ft. 0 in. to L.C., covered as to roof and partly as to sides with corrugated steel, and provided with windows, doors and monitor as shown. Where this house adjoins other houses, no partition will be provided. There will be floor framing for R.C. flooring at elevations 8 ft. 0 in., 26 ft. 0 in. and 44 ft. 0 in., and |