Bids are to be for a lump sum for the material delivered complete f.a.s., New The estimated shipping weight must be stated in the bid. Bids are to be accompanied by strain sheets giving calculated stresses and sizes of all material, construction and efficiencies of joints, etc. Bids are to be submitted in duplicate. Material to be Supplied Loads The material to be supplied by this contractor will consist of the tank complete with staging, cover, ladder inside and out, tell-tale, discharge piping complete with base-elbow and expansion-joint, manhole, foundation bolts; all rivets and bolts in 10 percent excess necessary to erect the above, and a liberal quantity of fitting-up bolts. This contractor will not supply any valve. Live Load. In calculating stresses, the water is to be figured at 62 1/2 lb. per cubic foot. No snow load. Wind Load. Forty pound per square foot of horizontal surface, reduced 50 percent for cylindrical surface. Total Load. The structures are to be designed for the maximum combination of dead, live and wind loads. Proportion of Parts The steel plates of the tanks are to be figured at a safe T.S. of not more than 12,500 lb. per square inch of net section. For the staging the following unit stresses are to be used: For wind strains the above stresses may be increased 66.7 percent. In calculating net area of sections, rivet holes are to be assumed 1/8-in. larger than undriven rivet. For the tank plates, no material less than 1/4 in. thick is to be used; but the For the staging, no material less than 1/4 in. thick is to be used except for fills; Posts.. 150 200 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 55/65,000 lb. per inch ultimate strength, castings to be of a good quality of gray iron, true and free from imperfections of any kind. All material to be the best of its respective kind, suitable to the use intended. 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. Marking All material is to be marked to correspond with an erection drawing. These marks are to be put on both sides of plates so as to obviate the trouble of turning over the plates to find the mark. The marks are to consist of a numeral preceded by the letter mark "WT." Also shipping marks are to be given as called for in formal order and in a different colored paint to that used in the erection marks. Inspection This material will be subject to inspection at any time by a representative of the B. E. Co. Any material found defective, or not properly marked, will be liable to rejection. Shop Painting All sheet metal work will be given one coat of boiled linseed oil in the shop. Bright surfaces will be covered with an anti-rust. Packing and Shipping This material will be knocked-down for export shipment, but as much of the Drawings Furnished As early as possible the contractor shall 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 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 materials the 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. SEC. III. OUTLINES FOR MISCELLANEOUS SPECIFICATIONS OUTLINE OF SPECIFICATION FOR A STEEL MILL BLDG. (Intended to accompany complete general arrangement drawings, giving principal dimensions, loads, special beam-spacing, etc., but not giving strains or sections except for special conditions. For an example of a specification for a group of buildings see p. 95. The following outline calls for prices both f.o.b. and erected.) "These specifications refer to the above drawings of the (— -) Engineering General Description Principal dimensions of building, mention of floors, crane-runways, stairs, monitors, ventilators, roofing, sides, windows, doors, etc., in a brief, descriptive manner. Also mention any special conditions of the design that may need to be emphasized. Conditions of Bids "Bids are requested as follows:" Proposal 1.-To be for a lump sum for the material f.o.b./f.a.s. (place), not Proposal 2.-To be for a lump sum/pound-price for the material erected at Material to be Supplied Loads To consist of all necessary structural steel work, columns, posts, trusses, rafters, knee-braces, monitor-framing, mullions, purlins, girts, crane girders with rails, clips and stops, shafting-supports, floor beams and girders, partition-framing, door-sills, rod and angle bracing, struts, tie-rods, hangers, trestles, stagings, elevator-hatch framing, steel plate flooring, curbs, wall plates, wall anchors, lintels, expanded metal or other reinforcement, finishing angles, sag-rods, grillage-beams and anchor bolts, field rivets and bolts in 10 percent to 20 percent excess, erection bolts. Also all the "Finishing Work," including corrugated galvanized steel roofing, siding and partition covering, gutters and leaders, ridge-roll, cornice, glass windows, window shutters, doors, skylights, window gratings, wire net, ventilators, louvres, door-guards, leader-boots, corner-boards, base-boards, casing, eaves flashing, casing covering, stack flashing and hood, and all fastenings required to erect the above. Wind horizontal, component formula for roof; vertical roof load (as alternate to the preceding), maximum strain to be used; the above to be in addition to loads given on drawings (Note: it is usually better to give floor, crane, and concentrated loads on the drawings). Initial stresses in bracing rods. Provision for earthquake strains. Proportion of Parts Steel Where sizes are not specified on drawings, the following unit stresses to be used: steel in tension, in compression, shear in shop rivets, in field rivets, bearing on shop rivets, on field rivets. Allowable percent increase in above for wind strains; decrease for electric crane (vertical) strains, or for other moving loads. Minimum thickness of metal (steel), exception in case of webs of rolled beams or channels. Purlins and girts to be figured as beams, not as catenaries. Maximum allowable 1/r for different conditions of struts and columns. Main frame to be designed to withstand all loads without aid from purlins, girts, etc. Nothing in the above to allow the use of members of lighter or weaker section than shown on drawings. T. S., quality, etc. (briefly). Field Connections Specify what parts are to be riveted and what bolted. Typical Details Details to be as per typical detail sheet submitted. Special Details Describe any special requirements, such as punching of beams, purlins or siding for wood connection or for fire-proofing attachment. Sheet Metal Work Doors Roof. Material, thickness, lap, method of attachment. Smoke-stack Hoods.-Material, thickness of metal, method of attachment. Leaders. (Sizes and location on drawing.) Material and thickness of metal. (Sizes on drawing.) Describe construction. Locks and keys to be provided. Windows (Sizes on drawing.) Describe construction. Excess glass to be supplied, and putty, etc., to make complete job. Skylights Stairs (Sizes on drawing.) Describe construction. Excess glass to be provided (to allow for breakage). (Dimensions on drawings.) Describe construction. Reinforcing Metal (Portions of floors to be covered shown on drawing.) Type of material required; sectional area per (stressed) lineal foot (or give gauge, mesh and weight per square foot); excess for laps; clips, etc., for attaching. Workmanship "To be first-class in every respect." Painting Steel work to be painted in shop with (one) coat of (— -) paint, parts inaccessible after erection two coats. Field painting (by owners). Marking So that marks will not be obliterated in transit; steel stamping dies to be used in addition to paint marks; shipping marks (as per instructions) to be given in addition to erection marks; shipping and erection marks to be in different colors. Packing and Boxing (All material to be knocked down for export shipment); small pieces boxed and wired, boxes numbered and contents given in packing list. Inspection At any time by representative of the (— -) Engineering Co. Drawings Furnished Shop detail drawings to be submitted in duplicate for approval, one set to be returned and other retained by engineers; work not in accordance with approved drawings liable to rejection; contractor to be liable for dimensions and details even on approved plans. Anchor-bolt plans to be supplied within (− -) days of date of order Erection drawings to be supplied at time of shipment of material. Delivery of Anchor-bolts Grillage-beams and anchor-bolts to be delivered (— not later than -) weeks from date of order. Alternate Quotations As requested by engineers or as contractor may desire. OUTLINE OF SPECIFICATION FOR A RETURN-TUBULAR BOILER (Intended to accompany fully designed drawings: for inquiry reminders for a standard boiler, see p. 134.) Heading as per examples, p. 92, etc. Drawings No. (-) and (-) "These specifications refer to the above drawings of the (——) Engineering Co., and are intended to cooperate with same." Type and General Dimensions Of the horizontal, return-tubular, externally fired type, about (▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬) diameter X (- -) long; steam-drum or dome; type of suspension; smokeuptake (if any). Working Pressure Boiler to be designed to withstand a working pressure of (— Conditions of Bids pound per -), not later than To be for lump-sum, for material f.o.b./f.a.s./erected at (- Material to be Supplied Number of complete units required. Shell. To be supplied completely riveted up, with tubes, braces, stay-rods, suspension lugs, manholes, handholes, nozzles, bushings, fusible-plug, feed-pipe bushing, studs for smoke-uptake connection. Steam-drum.-To be completely riveted up with all nozzles riveted on; pipes connecting to shell to be fitted to drum. Smoke-uptake.-As shown on drawing. Other Fittings.-Internal feed-pipe, safety-valve fitting, safety-valves, water column complete, steam-gauge, hangers, beams, saddle-castings, wall plates. Material not to be Supplied.-Enumerate such of above as are not to be supplied by this contractor. Quality of Materials Plate. To be full to gauge as called for on drawing. Cyclindrical plates of main shell to be of O. H. Fire Box Steel; heads of shell and steam-drum and barrel of drum to be of O. H. Flange Steel; all as per Manufacturers' Standard or A. S. T. M. specifications. Brands to be located so as to be visible after boiler is finished. |