Carthage or the Empire of Africa

Bücher

Angebote / Angebote:

PREFACE. Several years have elapsed since I first published the House Carpenters Assistant, which met with a ready sale of some seventeen hundred copies, but in consequence of the death of the publisher the work is now out of print. The object of the author is to revise the former work by omitting the treaties on mathematical instruments, to make room for additional matter that had been overlooked in the former work, in order to furnish house carpenters and builders with a new and easy system of lilies founded on geometrical principles for framing the most difficult L roofs for cutting every description of joints and for finding the sections of angular pieces at any point from a horizontal to a erpendicular, so that their sides shall be in the plane on the sides they are connected with for finding the form of the raking mould for a gable, to intersect with the horizontal mould at any angle diverging from a straight line the mitreing of circular mouldings the relative sizes of timbers framed to support it given weight to the mitreing of planes oblique to the base at any angle. Together with these rules, the author also presents tables of the weight and cohesive strength of the different materials used in the constructiorr of buildings as well as the weight required to crush said materials, with a treatise on the adhesion of nails, screws, iron pills and glue. Also an easy system of stair railing for straight end platform stairs, which will enable carpenters to finish and complete a dwelling without the assistance of a professional stair builder and to all this is added a practical and mathematical denonstration of finding the circumference and squaring the circle when the diameter is given. There can be but little doubt that a work of this kind is needed by architects and builders and especially by carpenters and workmen who are inexperienced in the different kinds of labor which they are called upon to perform. Many a journeyman carpenter has found himself suddenly thrown out of employment simply because he was ignorant of the rules by which he could perform some required task. It is rather for the benefit of such than for the experienced workmen, that this volume is designed, and should it be the means of promoting their interest or inciting them to a study of the noble science and art of construction, the author will feel well compensated for his Iabour. It is but due to aknowledge that we have consulted the valuable works of Thomas Tredgold, for the articles on the strength and weight of matials, also to Mr. Honetus M. Albee, a skillful and experienced stair-builder for the method of finding the distances to kerf the back string for circular stairs.Carpentry is the art of cutting and jointing timbers in the construction of buildings. To cut timbers and adapt them to their various situations, so that one of the sides of every piece shall be arranged according to a given plane or surface shown in the designs of the architect, is a department of carpentry which requires a thorongh knowledge of the finding of sections of solids, their coverings and the various methods of connecting timbers, etc. The art of combining pieces of timber to increase their strength and firmness, is called framing. The form of a frame should be adapted to the nature of the load which it is designed to carry. In carpentry, the load is usually distributed over the whole length of the framing, but it is generally supported frorn point to point, by short bearns or joists...