Details Of Masonry Pilaster Wall Design And Construction
Masonry pilaster wall is made with pilaster, a rectangular projectile column, formed with masonry blocks in the face of the wall and offer additional potency to the wall, filler wall, and foundation.
The pilaster is cantilevered up from the foundation and built at certain gaping at the wall length. Filler is masonry units that extends over horizontally among pilasters. Normally, dimensions of pilaster should remain at 40.64 cm width x 40.64 cm length. If spaced pilaster is utilized with masonry block filler, it will be very cost effective for freestanding wall or low height retaining walls.
This article sheds light on designing of filler, pilaster, and nominal footing.
Masonry Pilaster Filler Wall Design: Filler wall is expanded horizontally among pilasters to manage the spacing among pilasters. Freestanding wall resists wind force and in some cases seismic force. Lateral loads come from either direction of the wall. So, it is necessary to arrange for and set up steel reinforcement in the wall center.
Besides, when the wall supports earth fill, the major load is transmitted at the bottom of the wall and this load manages wall thickness. Under the situation, it is vital to arrange steel reinforcement at outside face of filler wall among pilasters.
To assess the cost-effectiveness, reinforcements are set up at the wall center according to either controlling positive moment at the middle of the span or negative moment at the pilasters.
Usually, ultimate applied moment is measured by applying the following equation:
Applied moment is failed at higher places or courses of the wall, so reinforcement ratio is reduced.
To design filler wall, the initial step is to work out lateral pressure at the base of wall and how they will be passed on to the pilasters through the nearby wall panels. Afterward, ascertain filler wall thickness, and finally measure reinforcement areas.
It is vital to set up least amount of vertical and horizontal reinforcement. Total reinforcement area for both directions is indicated as 0.002bd with no smaller than 0.007 in either direction.
Besides, vertical reinforcement is 13 mm diameter at spacing of around 81 mm or 122 mm.