/16
D~.P.ARTMENT OF' AGRICULTURE AU OF PUBLIC ROADS
Official Bualne . .
PIENALTY P'Oft PRIVATE U8K TO AVOID PAYMENT OF POSTAGIE, •aoo.
METAL IRRIGATION EQUIPMENT CULVERTS TANKS CANS
SIGNS ETC.
DENVER,COLO.
:D.Ifarch 3, 1926o
Mr. R. L. Parshall, Irrigation :Engineer,
u. s.
Experiment Station,Fort Collins, Colo. Dear Sir:
FACTORIES DENVER, COLORADO
MISSOULA. MONTANA
Thank you for your lette~ of March lst informing us regarding the pos8ibility of using several radial or roller bearing gates at the Bellvue laboratory. We note that you state that the three gates which will probably be installed will be 6 ft wide with
5t
ft clearance. We are not sure just what height of gate is re-quired, possibly 4 ft in as much as the old gate now being operated is 4 f t square. A gate of this dimension can be made in either the radial type or the roller or sliding type. For the sliding type, we would recommend Model 130 All-Steel Gate with rein::t'orced steel plate slide and structural steel frame. We have made these All-Steel Gates up to 8 ft square and feel quite confident you will find that the All-Steel Gate will be the most satisfactory type of construction ror this size. except possibly that a more powerful lii't will be required to op~rate the slide type gate, which of course, res1lits in a little slower operation; a quicker operation being obtained by the radial or roller type.t the time Mr. Bircket mentioned this installation we had in mind that you would need a gate possibly of a dimension sim-ilar to the one shown in the photograph which we mailed you. The chief advantage of the roller gate over the radial is that in extreme-ly wide gate with a low height it is impossible to provide sufficient lateral bracing in the radial gate to give satisfactory construction.
r~e have never listed a standard raok and pinion lift lor the reason that the rack lif't if it is not expensive is not de-pendable in operation and one that is depPndable, being composed of
carefully machined parts, is too expensive to warrant its use. For this reason we use screw lift gates as standard. One means of
pro-viding a powerful screw lift and at the same time speeding up operation is to motorize the hoist but we are not sure you would oare to do this, however, after the proposition developes a little further and you are able to state what materials you would like to receive quotations on, we will quote accordingly. Thank you for informing us that you have
just learned tna t the I~iinturn job is to be put through and that we will hear from you in the near future in regard to materials required.
Very truly yours, MAN:AN
T~~P1TY 1,\I!"G,
