Before starting to mix, annoyance and money may be saved by planning the
location of the mixing plant with regard to convenience in depositing
the concrete in the forms and ease of access to the materials. Often the
board can be located so that by moving it once or twice the bulk of the
concrete may be shoveled directly into the forms. It is more economical
to wheel material a distance of from 10 to 25 feet than to carry it in
shovels. Eight feet is about as far as it is profitable to shovel.
When material is to be wheeled, runways of planks should be provided,
because more material can be handled in a given time, and the wear and
tear on men and equipment is not so great. The planks used in the runways
should be thick enough to sustain the weight passing over them and should
be 10 to 12 inches wide to permit foot room. They should be anchored
securely and made rigid, as springy or loose boards retard progress
of the work. Smooth joints in the planking will prevent bumping and
stumbling.
[Illustration: Fig. 6.--Sectional forms.]